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Database-driven
database-driven web site means that the particular website is connected to a database and the content of that web page is based in part on information extracted from those databases.
Database-generated
When a web page is created dynamically from a database, it is called as database-generated web page. It will be in contrast with an HTML page which is static.
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.
Dedicated Server
Server which is limited to serving one website or a small collection of websites owned by a single person.
Deep submitting
Deep submitting is the process of submitting URLs of pages deep in a site to the search engines. Some search engine do not encourage deep because it unnecessarily clogs up their submission database.
Deep Linking
Deep linking makes the spiders find the pages quciker. It makes the job of search engines lesser, as deep linking happens to the content from the home page and it makes sure the spiders find the pages easier and fast.
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.
Demographics
Statistical data or characteristics which define segments of a population.
Del.icio.us
Popular social bookmarking website.
De-Listing
Temporarily or permanently becoming de-indexed from a directory or search engine.
Digg
Social news site where users vote on which stories get the most exposure and become the most popular.
Directory
A directory enables choosing the right category and composing key pharses rich description and ensure maximum visibility. They are grouped list of sites organized by topic.
Description
Directories and search engines provide a short description near each listing which aims to add context to the title.
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.
Doorway page
Doorway is also known as a bridge page. It is always not an important part of the website, but for the purpose of driving traffic.
Dreamweaver
Popular web development and editing software offering a what you see is what you get interface.
Dynamic Content
Content which changes over time or uses a dynamic language such as PHP to help render the page.
Dynamic Languages
Content which changes over time or uses a dynamic language such as PHP to help render the page.
Dynamic Page
Programming languages such as PHP or ASP which build web pages on the fly upon request.
Dynamic IP Address
A dynamic IP Address is also flexible in nature. It is a temporary IP Address. It is an identification assigned to a node in an IP network.
Domain
Domain is the URL of a website. When a user types a URL into a web browser, the Domain Name Server translates the URL into an IP address which is then used to find the actual website requested by the user.
Duplicate Content
A content copied form other web pages to increase ranking with the help of more kewords is called as duplicate content. Some search engine like Google have a filter that looks for duplicate text and thereby pushing the duplicated content deep inside the results.
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