Doorway page

Pages designed to rank for highly targeted search queries, typically designed to redirect searchers to a page with other advertisements. Some webmasters cloak [link:] thousands of doorway pages on trusted domains, and rake in a boatload of cash until they are caught and delisted [link:].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.Also known as a “bridge page” or a “gateway page”. A doorway page is a web page full of keyword-rich copy that doesn’t deliver any useful information on it other than a link into the site, and whose sole purpose is to be fed to the search engines.


The Open Directory Project is the largest, most trusted human edited directory of websites. DMOZ is owned by AOL, and is primarily ran by volunteer editors. It is likely that search engines place significant weight on links from this directory.

Visit DMOZ

Dynamic URL


A dynamic URL is the address of a Web page with content that depends on variable parameters that are provided to the server that delivers it.

The parameters may be already present in the URL itself or they may be the result of user input. A dynamic URL can often be recognized by the presence of certain characters or character strings that appear in the URL (visible in the address bar of your browser).

You might use URL parameters in your site to perform various functions apart from modifying the content of the page, such as,

  • Session ids – for tracking user sessions
  • Source trackers – for tracking the sources which are sending referrals to your pages and site
  • Format modifiers – for print formats etc

Example of dynamic URL (with paramters bolded):

It is generally my belief that dynamic URLs, with their long strings of random numbers and variables are not as SEO-friendly as Static URLs [link:].

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.

Highly popular social bookmarking website.



A URL that has been removed from a search engine’s index [link:]. Delisted sites are ignored by search engines. A site may become delisted for many reasons:

  • Engaging in Black-Hat SEO[link:] tactics
  • 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.
  • 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.
  • 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 re-inclusion.
  • During some updates search engines readjust crawl priorities.


Social news site where users vote (or “Digg”) on which stories get the most exposure and become the most popular.



A search site whose index is compiled by human editors (as opposed to web spiders). Although editors may pro actively include sites they consider to be of value, most inclusions are the result of submitted requests. The decision to include a site, and its subsequent ranking and categorization, is one of editorial judgment rather than being computed by an algorithm.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[link:] and the Yahoo! Directory[link:]. Smaller and less established general directories likely pull less weight. If a directory does not exercise editorial control over listings, search engines will be far less likely to trust their links.


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.

DNS Propagation

When a new domain name is registered (or an existing one is transferred to a new DNS), the information must make its way around the entire internet. This process usually takes around 24 hours, during which time the domain will be inaccessible to many or all users.


Scheme used for logical or location organization of the web. Many people also use the word domain to refer to a specific website (common domain extensions include .com, .net, .org, .edu, and .gov).

Domain Age

See Age[link:]

Domain Age


A document with a small amount of text (usually coherent but sometimes gibberish) intended to rank well specifically for one targeted expression. In the old days, people created as many doorways as they had targeted keywords and search engines to work with.

Domain Mirror

A domain mirror for your website enables you to host two domain names using the same web content. Typically, a domain mirror will be used to cheaply register variants of a domain name (i.e. – the and .com) and host them both using the same website. They can also be used to assist in the case of changing your domain since the old domain can be mirrored to the new domain once everything is set up.

Domain Authority

See Authority[link:]


Popular web development and editing software offering a WYSIWYG [link:] interface.

Visit 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:

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.

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.

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 [link:]. Dedicated servers usually run from $100 to $500 a month. Virtual servers typically run from $5 to $50 per month.

A link which points to an interior page within a website. When links grow naturally typically most high quality websites have many links pointing at many different 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.

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 solid information quality.


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.


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.