D
Database-driven
As in “database-driven web site.” Means that the website is connected to a database and web page content is based in part on information extracted from those databases.
Database-generated
As in “database-generated web page.” Means that a web page is created dynamically ‘on-the-fly’ from a database, in contrast with a static HTML page.
Daughter Window
An ad that runs in a separate window associated with a concurrently displayed banner. In normal practice, the content and banner are rendered first and the daughter window appears a moment later.
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.
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.
Deep submitting
Submitting URLs of pages deep in your site to the search engines. For example, if a webmaster of 200-page website submits each of those 200 pages. This tactic is frowned upon by some search engines because it unnecessarily clogs up their submission database when the search engine spider could find those pages on its own by exploring links starting at the home page.
Dedicated Server
Server which is limited to serving one website or a small collection of websites owned by a single person.
De-Listing
Temporarily or permanently becoming de-indexed from a directory or search engine.
Del.icio.us
Popular social bookmarking website.
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
Nick Denton (born August 24, 1966) is a British journalist and internet entrepreneur, the founder and proprietor of the blog collective Gawker Media, and the managing editor of the New York-based Gawker.com.
Description
Directories and search engines provide a short description near each listing which aims to add context to the title.
Directory
Human editors group websites into categories and provide site descriptions or edit descriptions that are submitted to them. With a directory, picking the right category and composing a description rich in key phrases will ensure maximum visibility. Contrast this with a search engine, which is unedited and concerned primarily with the HTML of a site’s constituent pages.
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.
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 page
Scheme used for logical or location organization of the web. Many people also use the word domain to refer to a specific website. Don’t use software tools that purport to auto-generate doorway pages. These pages are usually devoid of meaningful content. Google, in particular, is working on ways to identify and exclude machine-generated doorway pages.
Dreamweaver
Popular Website Development and editing software offering a what you see is what you get interface.
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.
Dynamic
Generated ‘on-the-fly’ from a database. Also see “database-driven.”
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.
Dynamic Rotation
Delivery of ads on a rotating, random basis. Dynamic rotation allows ads to be served on different pages of the site and exposes users to a variety of ads.
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