You should become familiar with these
SEO terms is you are planning to hire a company like
SEO Business Solutions to do your Search Engine Optimization.
0 - 9
200
Status OK - The file request was successful. For example, a page or image was found and loaded properly in a browser.
Some poorly developed content management systems return 200 status codes even when a file does not exist. The proper response for file not found is a 404.
See also:
W3C HTTP 1.1 Status Code Definitions
301
Moved Permanently - The file has been moved permanently to a new location.
This is the preferred method of redirecting for most pages or websites. If you are going to move an entire site to a new location you may want to test moving a file or folder first, and then if that ranks well you may want to proceed with moving the entire site. Depending on your site authority and crawl frequency it may take anywhere from a few days to a month or so for the 301 redirect to be picked up.
See also:
W3C HTTP 1.1 Status Code Definitions
On Apache servers you can redirect URLs in a .htaccess file or via in the headers of some dynamic pages. Most web hosts run on Apache.
On IIS servers you can redirect using ASP or ASP.net, or from within the internet manager.
302
Found - The file has been found, but is temporarily located at another URI.
Generally, as it relates to SEO, it is typically best to avoid using 302 redirects. Some search engines struggle with redirect handling. Due to poor processing of 302 redirects some search engines have allowed competing businesses to hijack the listings of competitors.
See also:
W3C HTTP 1.1 Status Code Definitions
404
Not Found - The server was unable to locate the URL.
Some content management systems send 404 status codes when documents do exist. Ensure files that exist do give a 200 status code and requests for files that do not exist give a 404 status code. You may also want to check with your host to see if you can set up a custom 404 error page which makes it easy for site visitors to
view your most popular and / or most relevant navigational options
report navigational problems within your site
Search engines request a robots.txt file to see what portions of your site they are allowed to crawl. Many browsers request a favicon.ico file when loading your site. While neither of these files are necessary, creating them will help keep your log files clean so you can focus on whatever other errors your site might have.
See also:
W3C HTTP 1.1 Status Code Definitions
A
Above the Fold
A term traditionally used to describe the top portion of a newspaper. In email or web marketing it means the area of content viewable prior to scrolling. Some people also define above the fold as an ad location at the very top of the screen, but due to banner blindness typical ad locations do not perform as well as ads that are well integrated into content. If ads look like content they typically perform much better.
See also:
Google AdSense heat map - shows ad clickthrough rate estimates based on ad positioning.
Absolute Link
A link which shows the full URL of the page being linked at. Some links only show relative link paths instead of having the entire reference URL within the a href tag. Due to canonicalization and hijacking related issues it is typically preferred to use absolute links over relative links.
Example absolute link
Cool Stuff Example relative link
Cool Stuff AdCenter
Microsoft's cost per click ad network.
While it has a few cool features (including dayparting and demographic based bidding) it is still quite nascent in nature compared to Google AdWords. Due to Microsoft's limited marketshare and program newness many terms are vastly underpriced and present a great arbitrage opportunity.
See also:
AdCenter - sign up for an account
Microsoft AdLabs - view many of the free search marketing tools Microsoft offers.
AdSense
Google's contextual advertising network. Publishers large and small may automatically publish relevant advertisements near their content and share the profits from those ad clicks with Google.
AdSense offers a highly scalable automated ad revenue stream which will help some publishers establish a baseline for the value of their ad inventory. In many cases AdSense will be underpriced, but that is the trade off for automating ad sales.
AdSense ad auction formats include
cost per click - advertisers are only charged when ads are clicked on
CPM - advertisers are charged a certain amount per ad impression. Advertisers can target sites based on keyword, category, or demographic information.
AdSense ad formats include
text
graphic
animated graphics
videos
In some cases I have seen ads which got a 2 or 3% click through rate (CTR), while sites that are optimized for maximum CTR (through aggressive ad integration) can obtain as high as a 50 or 60% CTR depending on
how niche their site is
how commercially oriented their site is
the relevancy and depth of advertisers in their vertical
It is also worth pointing out that if you are too aggressive in monetizing your site before it has built up adequate authority your site may never gain enough authority to become highly profitable.
Depending on your vertical your most efficient monetization model may be any of the following
AdSense
affiliate marketing
direct ad sales
selling your own products and services
a mixture of the above
See also:
Google AdSense program - sign up as an ad publisher
Google AdSense heat map - shows ad clickthrough rate estimates based on ad positioning.
Google AdWords - buy ads on Google search and / or contextually relevant web pages.
AdWords
Google's advertisement and link auction network. Most of Google's ads are keyword targeted and sold on a cost per click basis in an auction which factors in ad clickthrough rate as well as max bid. Google is looking into expanding their ad network to include video ads, demographic targeting, affiliate ads, radio ads, and traditional print ads.
AdWords is an increasingly complex marketplace. One could write a 300 page book just covering AdWords. Rather than doing that here I thought it would be useful to link to many relevant resources.
See also:
Google AdWords - sign up for an advertiser account
Google Advertising Professional Program - program for qualifying as an AdWords expert
Google AdWords Learning Center - text and multimedia educational modules. Contains quizzes related to each section.
AdWords Keyword Tool - shows related keywords, advertiser competition, and relative search volume estimates.
Google Traffic Estimator - estimates bid prices and search volumes for keywords.
Free PPC tips [PDF] - my ebook offering free pay per click advice.
Andrew Goodman's Google AdWords Handbook - costs roughly $75, but is well worth it
Affiliate Marketing
Affiliate marketing programs allows merchants to expand their market reach and mindshare by paying independent agents on a cost per action (CPA) basis. Affiliates only get paid if visitors complete an action.
Most affiliates make next to nothing because they are not aggressive marketers, have no real focus, fall for wasting money on instant wealth programs that lead them to buying a bunch of unneeded garbage via other's affiliate links, and do not attempt to create any real value.
Some power affiliates make hundreds of thousands or millions of dollars per year because they are heavily focused on automation and/or tap large traffic streams. Typically niche affiliate sites make more per unit effort than overtly broad ones because they are easier to focus (and thus have a higher conversion rate).
Selling a conversion is typically harder than selling a click (like AdSense does, for instance). Search engines are increasingly looking to remove the noise low quality thin affiliate sites ad to the search results through the use of
algorithms which detect thin affiliate sites and duplicate content;
manual review; and,
implementation of landing page quality scores on their paid ads.
See also:
Commission Junction - probably the largest affiliate network
Linkshare - another large affiliate network
Performics - another large affiliate network
Azoogle Ads - ad offer network focused on high margin / high profit verticals
CPA Empire - similar to AzoogleAds
Amazon Associates - Amazon's affiliate program
Clickbank - an affiliate network for selling electronic products and information
Age
Some social networks or search systems may take site age, page age, user account age, and related historical data into account when determining how much to trust that person, website, or document. Some specialty search engines, like blog search engines, may also boost the relevancy of new documents.
Fresh content which is also cited on many other channels (like related blogs) will temporarily rank better than you might expect because many of the other channels which cite the content will cite it off their home page or a well trusted high PageRank page. After those sites publish more content and the reference page falls into their archives those links are typically from pages which do not have as much link authority as their home pages.
Some search engines may also try to classify sites to understand what type of sites they are, as in news sites or reference sites that do not need updated that often. They may also look at individual pages and try to classify them based on how frequently they change.
See also:
Google Patent 20050071741: Information retrieval based on historical data - mentions that document age, link age, link bursts, and link churn may be used to help score the relevancy of a document.
AJAX
Asynchronous JavaScript and XML is a technique which allows a web page to request additional data from a server without requiring a new page to load.
Alexa
Amazon.com owned search service which measures website traffic.
Alexa is heavily biased toward sites that focus on marketing and webmaster communities. While not being highly accurate it is free.
See also
Alexa.com
AllTheWeb
Search engine which was created by Fast, then bought by Overture, which was bought by Yahoo. Yahoo may use AllTheWeb as a test bed for new search technologies and features.
See also:
AllTheWeb
Alt Attribute
Blind people and most major search engines are not able to easily distinguish what is in an image. Using an image alt attribute allows you to help screen readers and search engines understand the function of an image by providing a text equivalent for the object.
Example usage
See also
W3C QA: Alt Attribute
AltaVista
Search engine bought out by Overture prior to Overture being bought by Yahoo. AltaVista was an early powerhouse in search, but on October 25, 1999 they did a major algorithmic update which caused them to dump many websites. Ultimately that update and brand mismanagement drove themselves toward irrelevancy and a loss of mindshare and marketshare.
See also:
AltaVista
Amazon.com
The largest internet retailing website. Amazon.com is rich in consumer generated media. Amazon also owns a number of other popular websites, including IMDB and Alexa.
See also:
Amazon.com - official site
Analytics
Software which allows you to track your page views, user paths, and conversion statistics based upon interpreting your log files or through including a JavaScript tracking code on your site.
Ad networks are a game of margins. Marketers who track user action will have a distinct advantage over those who do not.
See also:
Google Analytics - Google's free analytics program
Conversion Ruler - a simple and cheap web based analytic tool
ClickTracks - downloadable and web based analytics software
Anchor Text
The text that a user would click on to follow a link. In the case the link is an image the image alt attribute may act in the place of anchor text.
Search engines assume that your page is authoritative for the words that people include in links pointing at your site. When links occur naturally they typically have a wide array of anchor text combinations. Too much similar anchor text may be a considered a sign of manipulation, and thus discounted or filtered. Make sure when you are building links that you control that you try to mix up your anchor text.
Example of anchor text:
Search Engine Optimization Blog Outside of your core brand terms if you are targeting Google you probably do not want any more than 10% to 20% of your anchor text to be the same. You can use Backlink Analyzer to compare the anchor text profile of other top ranked competing sites.
See also:
Backlink Analyzer - free tool to analyze your link anchor text
AOL
Popular web portal which merged with Time Warner.
API
Application Program Interface - a series of conventions or routines used to access software functions. Most major search products have an API program.
Arbitrage
Exploiting market inefficiencies by buying and reselling a commodity for a profit. As it relates to the search market, many thin content sites laced with an Overture feed or AdSense ads buy traffic from the major search engines and hope to send some percent of that traffic clicking out on a higher priced ad. Shopping search engines generally draw most of their traffic through arbitrage.
See also:
Wolf-Howl: AdSense Arbitrage: Tips, Tricks & Secrets
[audio] Jeremy Shoemaker interviews Kris Jones and part 2
Wikipedia: arbitrage
ASP
Active Server Pages - a dynamic Microsoft programming language.
See also:
ASP.net
Ask
Ask is a search engine owned by InterActive Corp. They were originally named Ask Jeeves, but they dumped Jeeves in early 2006. Their search engine is powered by the Teoma search technology, which is largely reliant upon Kleinberg's concept of hubs and authorities.
See also:
Ask
Ask Sponsored Listings - Ask syndicates AdWords ads, but also sells internal pay per click ads as well
Ask Webmaster Help
Authority
The ability of a page or domain to rank well in search engines. Five large factors associated with site and page authority are link equity, site age, traffic trends, site history, and publishing unique original quality content.
Search engines constantly tweak their algorithms to try to balance relevancy algorithms based on topical authority and overall authority across the entire web. Sites may be considered topical authorities or general authorities. For example, Wikipedia and DMOZ are considered broad general authority sites. This site is a topical authority on SEO, but not a broad general authority.
Authorities
Topical authorities are sites which are well trusted and well cited by experts within their topical community. A topical authority is a page which is referenced from many topical experts and hub sites. A topical hub is page which references many authorities.
Example potential topical authorities:
the largest brands in your field
the top blogger talking about your subject
the Wikipedia or DMOZ page about your topic
See also:
Mike Grehan on Topic Distillation [PDF]
Jon Klienberg's Authoritative sources in a hyperlinked environment [PDF]
Jon Klienberg's home page
Hypersearching the Web
Automated Bid Management Software
Pay per click search engines are growing increasingly complex in their offerings. To help large advertisers cope with the increasing sophistication and complexity of these offerings some search engines and third party software developers have created software which makes it easier to control your ad spend. Some of the more advanced tools can integrate with your analytics programs and help you focus on conversion, ROI, and earnings elasticity instead of just looking at cost per click.
See also:
If you want to program internal bid management software you can get a developer token to use the Google AdWords API.
A few popular bid management tools are
Atlas OnePoint (formerly known as GoToast)
BidRank
KeywordMax
B
Backlink (see Inbound Link)
Bait and Switch
Marketing technique where you make something look overtly pure or as though it has another purpose to get people to believe in it or vote for it (by linking at it or sharing it with friends), then switch the intent or purpose of the website after you gain authority.
It is generally easier to get links to informational websites than commercial sites. Some new sites might gain authority much quicker if they tried looking noncommercial and gaining influence before trying to monetize their market position.
Banner Blindness
During the first web boom many businesses were based on eyeballs more than actually building real value. Many ads were typically quite irrelevant and web users learned to ignore the most common ad types.
In many ways text ads are successful because they are more relevant and look more like content, but with the recent surge in the popularity of text ads some have speculated that in time people may eventually become text ad blind as well.
Nick Denton stated:
Imagine a web in which Google and Overture text ads are everywhere . Not only beside search results, but next to every article and weblog post. Ubiquity breeds contempt. Text ads, coupled with content targeting, are more effective than graphic ads for many advertisers; but they too, like banners, will suffer reader burnout.Battelle, John
Popular search and media blogger who co-founded The Industry Standard and Wired, and authored a popular book on search called The Search.
See also:
Searchblog - blog about the intersection of search, media, and technology.
The Search - John's book about the history and future of search.
The Database of Intentions - post about how search engines store many of our thoughts
Web 2.0 Conference - conference run by John Battelle.
Battelle's Google speech
Behavioral Targeting
Ad targeting based on past recent experience and/or implied intent. For example, if I recently searched for mortgages then am later reading a book review the page may still show me mortgage ads.
Bias
A prejudice based on experiences or a particular worldview.
Any media channel, publishing format, organization, or person is biased by
how and why they were created and their own experiences
the current set of social standards in which they exist
other markets they operate in
the need for self preservation
how they interface with the world around them
their capital, knowledge, status, or technological advantages and limitations
Search engines aim to be relevant to users, but they also need to be profitable. Since search engines sell commercial ads some of the largest search engines may bias their organic search results toward informational (ie: non-commercial) websites. Some search engines are also biased toward information which has been published online for a great deal of time and is heavily cited.
Search personalization biases our search results based on our own media consumption and searching habits.
Large news organizations tend to aim for widely acceptable neutrality rather than objectivity. Some of the most popular individual web authors / publishers tend to be quite biased in nature. Rather than bias hurting one's exposure
The known / learned bias of a specific author may make their news more appealing than news from an organization that aimed to seem arbitrarily neutral.
I believe biased channels most likely typically have a larger readership than unbiased channels.
Most people prefer to subscribe to media which matches their own biases worldview.
If more people read what you write and passionately agree with it then they are more likely to link at it.
Things which are biased in nature are typically easier to be cited than things which are unbiased.
See also:
Alejandro M. Diaz's Through the Google Goggles [PDF] - thesis paper on Google's biases
A Thousand Years of Nonlinear History - looks at economic, biological, and linguistic history
Manufacturing Consent - Noam Chomsky DVD and book about mainstream media bias toward business interests
Comparison of the major search algorithms
Wikipedia: Bias
Bid Management Software (see Automated Bid Management Software)
Black Hat SEO
Search engines set up guidelines that help them extract billions of dollars of ad revenue from the work of publishers and the attention of searchers. Within that highly profitable framework search engines consider certain marketing techniques deceptive in nature, and label them as black hat SEO. Those which are considered within their guidelines are called white hat SEO techniques. The search guidelines are not a static set of rules, and things that may be considered legitimate one day may be considered deceptive the next.
Search engines are not without flaws in their business models, but there is nothing immoral or illegal about testing search algorithms to understand how search engines work.
People who have extensively tested search algorithms are probably more competent and more knowledgeable search marketers than those who give themselves the arbitrary label of white hat SEOs while calling others black hat SEOs.
When making large investments in processes that are not entirely clear trust is important. Rather than looking for reasons to not work with an SEO it is best to look for signs of trust in a person you would like to work with.
See also:
Black Hat SEO.com - parody site about black hat SEO
White Hat SEO.com - parody site about white hat SEO
Honest SEO - site offering tips on hiring an SEO
SEOConsultants.com - reviewed directory of SEO professionals
SEO Black Hat - blog about black hat SEO techniques
Block Level Analysis
A method used to break a page down into multiple points on the web graph by breaking its pages down into smaller blocks.
Block level link analysis can be used to help determine if content is page specific or part of a navigational system. It also can help determine if a link is a natural editorial link, what other links that link should be associated with, and/or if it is an advertisement. Search engines generally do not want to count advertisements as votes.
See also
Microsoft Research: Block-level Link Analysis
Blog
A periodically updated journal, typically formatted in reverse chronological order. Many blogs not only archive and categorize information, but also provide a feed and allow simple user interaction like leaving comments on the posts.
Most blogs tend to be personal in nature. Blogs are generally quite authoritative with heavy link equity because they give people a reason to frequently come back to their site, read their content, and link to whatever they think is interesting.
The most popular blogging platforms are Wordpress, Blogger, Movable Type, and Typepad.
Blog Comment Spam
Either manually or automatically (via a software program) adding low value or no value comments to other sites.
Automated blog spam:
Nice post!
by
Discreat Overnight Viagra Online Canadian Pharmacy Free Shipping
Manual blog spam:
I just wrote about this on my site. I don't know you, but I thought I would add no value to your site other than linking through to mine. Check it out!!!!!
by
cluebag manual spammer (usually with keywords as my name)
As time passes both manual and automated blog comment spam systems are evolving to look more like legitimate comments. I have seen some automated blog comment spam systems that have multiple fake personas that converse with one another.
Blogger
Blogger is a free blog platform owned by Google.
It allows you to publish sites on a subdomain off of Blogspot.com, or to FTP content to your own domain. If you are serious about building a brand or making money online you should publish your content to your own domain because it can be hard to reclaim a website's link equity and age related trust if you have built years of link equity into a subdomain on someone else's website.
Blogger is probably the easiest blogging software tool to use, but it lacks many some features present in other blog platforms.
See also:
Blogger.com
Blogroll
Link list on a blog, usually linking to other blogs owned by the same company or friends of that blogger.
Bold
A way to make words appear in a bolder font. Words that appear in a bolder font are more likely to be read by humans that are scanning a page. A search engine may also place slightly greater weighting on these words than regular text, but if you write natural page copy and a word or phrase appears on a page many times it probably does not make sense or look natural if you bold ever occurrence.
Example use:
words words Either would appear as words.
Bookmarks
Most browsers come with the ability to bookmark your favorite pages. Many web based services have also been created to allow you to bookmark and share your favorite resources. The popularity of a document (as measured in terms of link equity, number of bookmarks, or usage data) is a signal for the quality of the information. Some search engines may eventually use bookmarks to help aid their search relevancy.
Social bookmarking sites are often called tagging sites. Del.icio.us is the most popular social bookmarking site. Yahoo! MyWeb also allows you to tag results. Google allows you to share feeds and / or tag pages. They also have a program called Google Notebook which allows you to write mini guides of related links and information.
There are also a couple meta news sites that allow you to tag interesting pages. If enough people vote for your story then your story gets featured on the homepage. Slashdot is a tech news site primarily driven by central editors. Digg created a site covering the same type of news, but is a bottoms up news site which allows readers to vote for what they think is interesting. Netscape cloned the Digg business model and content model. Sites like Digg and Netscape are easy sources of links if you can create content that would appeal to those audiences.
Many forms of vertical search, like Google Video or YouTube, allow you to tag content.
See also:
Del.icio.us - Yahoo! owned social bookmarking site
Yahoo! MyWeb - similar to Del.icio.us, but more integrated into Yahoo!
Google Notebook - allows you to note documents
Slashdot - tech news site where stories are approved by central editors
Digg - decentralized news site
Netscape - Digg clone
Google Video - Google's video hosting, tagging, and search site
YouTube - popular decentralized video site
Boolean Search
Many search engines allow you to perform searches that contain mathematical formulas such as AND, OR, or NOT. By default most search engines include AND with your query, requiring results to be relevant for all the words in your query.
Examples:
A Google search for SEO Book will return results for SEO AND Book.
A Google search for "SEO Book" will return results for the phrase SEO Book.
A Google search for SEO Book -Jorge will return results containing SEO AND Book but NOT Jorge.
A Google search for ~SEO -SEO will find results with words related to SEO that do not contain SEO.
Some search engines also allow you to search for other unique patterns or filtering ideas. Examples:
A numerical range: 12...18 would search for numbers between 12 and 18.
Recently updated: seo {frsh=100} would find recently updated documents. MSN search also lets you place more weight on local documents
Related documents: related:www.threadwatch.org would find documents related to Threadwatch.
Filetype: AdWords filetype:PDF would search for PDFs that mentioned AdWords.
Domain Extension: SEO inurl:.edu
IP Address: IP:64.111.97.133
See also:
Search Engine Showdown Features Chart - Greg R.Notess's comparison of features at major search engines.
Brand
The emotional response associated with your company and/or products.
A brand is built through controlling customer expectations and the social interactions between customers. Building a brand is what allows you to move away from commodity based pricing and move toward higher margin value based pricing.
See also:
Rob Frankel - branding expert who provides free branding question answers every Monday. He also offers Frankel's Laws of Big Time Branding™, blogs, and wrote the branding book titled The Revenge of Brand X.
Branded Keywords
Keywords or keyword phrases associated with a brand. Typically branded keywords occur late in the buying cycle, and are some of the highest value and highest converting keywords.
Some affiliate marketing programs prevent affiliates from bidding on the core brand related keywords, while others actively encourage it. Either way can work depending on your business model and marketing savvy, but it is important to ensure there is synergy between internal marketing and affiliate marketing programs.
Breadcrumb Navigation
Navigational technique used to help search engines and website users understand the relationship between pages.
Example breadcrumb navigation:
Home > SEO Tools > SEO for Firefox
Whatever page the user is on is unlinked, but the pages above it within the site structure are linked to, and organized starting with the home page, right on down through the site structure.
Brin, Sergey
Co-founder of Google.
See also:
Wikipedia: Sergey Brin
Broken Link
A hyperlink which is not functioning. A link which does not lead to the desired location.
Links may broken for a number of reason, but four of the most common reasons are
a website going offline
linking to content which is temporary in nature (due to licensing structures or other reasons)
moving a page's location
changing a domain's content management system
Most large websites have some broken links, but if too many of a site's links are broken it may be an indication of outdated content, and it may provide website users with a poor user experience. Both of which may cause search engines to rank a page as being less relevant.
Xenu Link Sleuth is a free software program which crawls websites to find broken links.
Browser
Client used to view the world wide web.
The most popular browsers are Microsoft's Internet Explorer, Mozilla's Firefox, Safari, and Opera.
Bush, Vannevar
WWII scientist who wrote a seminal research paper on the concepts of hypertext and a memory extension device titled As We May Think.
Business.com
A well trusted directory of business websites and information. Business.com is also a large pay per click arbitrage player.
See also:
Business.com
Buying Cycle
Before making large purchases consumers typically research what brands and products fit their needs and wants. Keyword based search marketing allows you to reach consumers at any point in the buying cycle. In many markets branded keywords tend to have high search volumes and high conversion rates.
The buying cycle may consist of the following stages
Problem Discovery: prospect discovers a need or want.
Search: after discovering a problem look for ways to solve the need or want. These searches may contain words which revolve around the core problem the prospect is trying to solve or words associated with their identity.
Evaluate: may do comparison searches to compare different models, and also search for negative information like product sucks, etc.
Decide: look for information which reinforces your view of product or service you decided upon
Purchase: may search for shipping related information or other price related searches. purchases may also occur offline
Reevaluate: some people leave feedback on their purchases . If a person is enthusiastic about your brand they may cut your marketing costs by providing free highly trusted word of mouth marketing.
See also:
Waiting for Your Cat to Bark? - book by Brian & Jeffrey Eisenberg about the buying cycle and Persuading Customers When They Ignore Marketing.
C
Cache
Copy of a web page stored by a search engine. When you search the web you are not actively searching the whole web, but are searching files in the search engine index.
Some search engines provide links to cached versions of pages in their search results, and allow you to strip some of the formatting from cached copies of pages.
Calacanis, Jason
Founder of Weblogs, Inc. Also pushed AOL to turn Netscape into a Digg clone.
See also:
Calacanis.com - Jason's blog
Canonical URL
Many content management systems are configured with errors which cause duplicate or exceptionally similar content to get indexed under multiple URLs. Many webmasters use inconsistent link structures throughout their site that cause the exact same content to get indexed under multiple URLs. The canonical version of any URL is the single most authoritative version indexed by major search engines. Search engines typically use PageRank or a similar measure to determine which version of a URL is the canonical URL.
Webmasters should use consistent linking structures throughout their sites to ensure that they funnel the maximum amount of PageRank at the URLs they want indexed. When linking to the root level of a site or a folder index it is best to end the link location at a / instead of placing the index.html or default.asp filename in the URL.
Examples of URLs which may contain the same information in spite of being at different web addresses:
http://www.seobook.com/
http://www.seobook.com/index.shtml
http://seobook.com/
http://seobook.com/index.shtml
http://www.seobook.com/?tracking-code
Catalog (see Index)
Catch All Listing
A listing used by pay per click search engines to monetize long tail terms that are not yet targeted by marketers. This technique may be valuable if you have very competitive key words, but is not ideal since most major search engines have editorial guidelines that prevent bulk untargeted advertising, and most of the places that allow catch all listings have low traffic quality. Catch all listings may be an attractive idea on theme specific search engines and directories though, as they are already pre qualified clicks.
CGI
Common Gateway Interface - interface software between a web server and other machines or software running on that server. Many cgi programs are used to add interactivity to a web site.
Client
A program, computer, or process which makes information requests to another computer, process, or program.
Cloaking
Displaying different content to search engines and searchers. Depending on the intent of the display discrepancy and the strength of the brand of the person / company cloaking it may be considered reasonable or it may get a site banned from a search engine.
Cloaking has many legitimate uses which are within search guidelines. For example, changing user experience based on location is common on many popular websites.
See also:
The Definitive Guide to Cloaking - Dan Kramer's guide to cloaking. I also interviewed Dan here.
KloakIt - cheaply priced cloaking software
Fantomaster - more expensive cloaking software
Cluetrain Manifesto, The
Book about how the web is a marketplace, and how it is different from traditional offline business.
See also:
The Cluetrain Manifesto website - offers the book for free online.
Clustering
In search results the listings from any individual site are typically limited to a certain number and grouped together to make the search results appear neat and organized and to ensure diversity amongst the top ranked results. Clustering can also refer to a technique which allows search engines to group hubs and authorities on a specific topic together to further enhance their value by showing their relationships.
See also
Google Touchgraph - interesting web application that shows the relationship between sites Google returns as being related to a site you enter.
CMS
Content Management System. Tool used to help make it easy to update and add information to a website.
Blog software programs are some of the most popular content management systems currently used on the web. Many content management systems have errors associated with them which make it hard for search engines to index content due to issues such as duplicate content.
Co-citation
In topical authority based search algorithms links which appear near one another on a page may be deemed to be related to one another. In algorithms like latent semantic indexing words which appear near one another often are frequently deemed to be related.
Comments
Many blogs and other content management systems allow readers to leave user feedback.
Leaving enlightening and thoughtful comments on someone else's related website is one way to help get them to notice you.
See also:
blog comment spam - the addition of low value or no value comments to other's websites
Comments Tag
Some web developers also place comments in the source code of their work to help make it easy for people to understand the code.
HTML comments in the source code of a document appear as . They can be viewed if someone types views the source code of a document, but do not appear in the regular formatted HTML rendered version of a document.
In the past some SEOs would stuff keywords in comment tags to help increase the page keyword density, but search has evolved beyond that stage, and at this point using comments to stuff keywords into a page adds to your risk profile and presents little ranking upside potential.
Compacted Information
Information which is generally and widely associated with a product. For example, most published books have an ISBN.
As the number of product databases online increases and duplicate content filters are forced to get more aggressive the keys to getting your information indexed are to have a site with enough authority to be considered the most important document on that topic, or to have enough non compacted information (for example, user reviews) on your product level pages to make them be seen as unique documents.
Conceptual Links
Links which search engines attempt to understand beyond just the words in them. Some rather advanced search engines are attempting to find out the concept links versus just matching the words of the text to that specific word set. Some search algorithms may even look at co-citation and words near the link instead of just focusing on anchor text.
Concept Search
A search which attempts to conceptually match results with the query, not necessarily with those words, rather their concept.
For example, if a search engine understands a phrase to be related to another word or phrase it may return results relevant to that other word or phrase even if the words you searched for are not directly associated with a result. In addition, some search engines will place various types of vertical search results at the top of the search results based on implied query related intent or prior search patterns by you or other searchers.
Contextual Advertising
Advertising programs which generate relevant advertisements based on the content of a webpage.
See also:
Google AdSense is the most popular contextual advertising program.
Conversion
Many forms of online advertising are easy to track. A conversion is reached when a desired goal is completed.
Most offline ads have generally been much harder to track than online ads. Some marketers use custom phone numbers or coupon codes to tie offline activity to online marketing.
Here are a few common example desired goals
a product sale
completing a lead form
a phone call
capturing an email
filling out a survey
getting a person to pay attention to you
getting feedback
having a site visitor share your website with a friend
having a site visitor link at your site
Bid management, affiliate tracking, and analytics programs make it easy to track conversion sources.
See also:
Google Conversion University - free conversion tracking information
Google Website Optimizer - free multi variable testing product offered by Google.
Copyright
The legal rights to publish and reproduce a particular piece of work.
See also:
Copyright.gov
Cookie
Small data file written to a user's local machine to track them. Cookies are used to help websites customize your user experience and help affiliate program managers track conversions.
CPA
Cost per action. The effectiveness of many other forms of online advertising have their effectiveness measured on a cost per action basis. Many affiliate marketing programs and contextual ads are structured on a cost per action basis. An action may be anything from an ad click, to filling out a lead form, to buying a product.
CPC
Cost per click. Many search ads and contextually targeted ads are sold in auctions where the advertiser is charged a certain price per click.
See also:
Google AdWords - Google's pay per click ad program which allows you to buy search and contextual ads.
Google AdSense - Google's contextual ad program.
Microsoft AdCenter - Microsoft's pay per click ad platform.
Yahoo! Search Marketing - Yahoo!'s pay per click ad platform
CPM
Cost per thousand ad impressions.
Many people use CPM as a measure of how profitable a website is or has the potential of becoming.
Crawl Depth
How deeply a website is crawled and indexed.
Since searches which are longer in nature tend to be more targeted in nature it is important to try to get most or all of a site indexed such that the deeper pages have the ability to rank for relevant long tail keywords. A large site needs adequate link equity to get deeply indexed. Another thing which may prevent a site from being fully indexed is duplicate content issues.
Crawl Frequency
How frequently a website is crawled.
Sites which are well trusted or frequently updated may be crawled more frequently than sites with low trust scores and limited link authority. Sites with highly artificial link authority scores (ie: mostly low quality spammy links) or sites which are heavy in duplicate content or near duplicate content (such as affiliate feed sites) may be crawled less frequently than sites with unique content which are well integrated into the web.
See also:
Google's Matt Cutts video on Google Crawling Patterns
Matt Cutts post Indexing Timeline - mentions sites with unnatural link profiles may not be crawled as frequently or deeply
CSS
Cascading Style Sheets is a method for adding styles to web documents.
Note: Using external CSS files makes it easy to change the design of many pages by editing a single file. See also
W3C: CSS - official guidelines for CSS
CSS Zen Garden - examples of various CSS layouts
Glish.com - examples of various CSS layouts, links to other CSS resources
CTR
Clickthrough rate - the percentage of people who view click on an advertisement they viewed, which is a way to measure how relevant a traffic source or keyword is. Search ads typically have a higher clickthrough rate than traditional banner ads due to being highly relevant to implied searcher demand.
Cutts, Matt
Google's head of search quality.
See also:
Matt Cutts blog
Interview of Matt Cutts
SEO Videos by Matt Cutts
Cybersquatting
Registering domains related to other trademarks or brands in an attempt to cash in on the value created by said trademark or brand.
D
Dayparting
Turning ad campaigns on or off, changing ad bid price, or budget constraints based on bidding more when your target audience is available and less when they are less likely to be available.
Dead Link
A link which is no longer functional.
Most large high quality websites have at least a few dead links in them, but the ratio of good links to dead links can be seen as a sign of information quality.
Deep Link
A link which points to an internal page within a website.
When links grow naturally typically most high quality websites have many links pointing at interior pages. When you request links from other websites it makes sense to request a link from their most targeted relevant page to your most targeted relevant page. Some webmasters even create content based on easy linking opportunities they think up.
Dedicated Server
Server which is limited to serving one website or a small collection of websites owned by a single person.
Dedicated servers tend to be more reliable than shared (or virtual) servers. Dedicated servers usually run from $100 to $500 a month. Virtual servers typically run from $5 to $50 per month.
Deep Link Ratio
The ratio of links pointing to internal pages to overall links pointing at a website.
A high deep link ratio is typically a sign of a legitimate natural link profile.
De-Listing
Temporarily or permanently becoming de-indexed from a directory or search engine.
De-indexing may be due to any of the following:
Pages on new websites (or sites with limited link authority relative to their size) may be temporarily de-indexed until the search engine does a deep spidering and re-cache of the web.
During some updates search engines readjust crawl priorities.
You need a significant number of high quality links to get a large website well indexed and keep it well indexed.
Duplicate content filters, inbound and outbound link quality, or other information quality related issues may also relate to re-adjusted crawl priorities.
Pages which have changed location and are not properly redirected, or pages which are down when a search engine tries to crawl them may be temporarily de-indexed.
Search Spam:
If a website tripped an automatic spam filter it may return to the search index anywhere from a few days to a few months after the problem has been fixed.
If a website is editorially removed by a human you may need to contact the search engine directly to request reinclusion.
Del.icio.us
Popular social bookmarking website.
See also:
Del.icio.us
Del.icio.us Recently Popular
Demographics
Statistical data or characteristics which define segments of a population.
Some internet marketing platforms, such as AdCenter and AdWords, allow you to target ads at websites or searchers who fit amongst a specific demographic. Some common demographic data points are gender, age, income, education, location, etc.
Denton, Nick
Publisher of Gawker, a popular ring of topical weblogs, which are typically focused on controversy.
See also:
Nick Denton.org - official blog, where Nick often talks about business and his various blogs.
Description
Directories and search engines provide a short description near each listing which aims to add context to the title.
High quality directories typically prefer the description describes what the site is about rather than something that is overtly promotional in nature. Search engines typically
use a description from a trusted directory (such as DMOZ or the Yahoo! Directory) for homepages of sites listed in those directories
use the page meta description (especially if it is relevant to the search query and has the words from the search query in it)
attempt to extract a description from the page content which is relevant for the particular search query and ranking page (this is called a snippet)
or some combination of the above
Digg
Social news site where users vote on which stories get the most exposure and become the most popular.
See also:
Digg.com
Directory
A categorized catalog of websites, typically manually organized by topical editorial experts.
Some directories cater to specific niche topics, while others are more comprehensive in nature. Major search engines likely place significant weight on links from DMOZ and the Yahoo! Directory. Smaller and less established general directories likely pull less weight. If a directory does not exercise editorial control over listings search engines will not be likely to trust their links at all.
DMOZ
The Open Directory Project is the largest human edited directory of websites. DMOZ is owned by AOL, and is primarily ran by volunteer editors.
See also:
DMOZ.org
Submitting a Site to the Open Directory Project
DNS
Domain Name Server or Domain Name System. A naming scheme mechanism used to help resolve a domain name / host name to a specific TCP/IP Address.
Domain
Scheme used for logical or location organization of the web. Many people also use the word domain to refer to a specific website.
Doorway Pages
Pages designed to rank for highly targeted search queries, typically designed to redirect searchers to a page with other advertisements.
Some webmasters cloak thousands of doorway pages on trusted domains, and rake in a boatload of cash until they are caught and de-listed. If the page would have a unique purpose outside of search then search engines are generally fine with it, but if the page only exists because search engines exist then search engines are more likely to frown on the behavior.
Dreamweaver
Popular web development and editing software offering a what you see is what you get interface.
See also:
Dreamweaver official site
Duplicate Content
Content which is duplicate or near duplicate in nature.
Search engines do not want to index multiple versions of similar content. For example, printer friendly pages may be search engine unfriendly duplicates. Also, many automated content generation techniques rely on recycling content, so some search engines are somewhat strict in filtering out content they deem to be similar or nearly duplicate in nature.
See also:
Duplicate Content Detection - video where Matt Cutts talks about the process of duplicate content detection
Identifying and filtering near-duplicate documents
Search Engine Patents On Duplicated Content and Re-Ranking Methods
Stuntdubl: How to Remedy Duplicate Content
Dynamic Content
Content which changes over time or uses a dynamic language such as PHP to help render the page.
In the past search engines were less aggressive at indexing dynamic content than they currently are. While they have greatly improved their ability to index dynamic content it is still preferable to use URL rewriting to help make dynamic content look static in nature.
Dynamic Languages
Programming languages such as PHP or ASP which build web pages on the fly upon request.
