The technique of purchasing large numbers of sites in order to generate material traffic from randomly or accidentally entered domain names by users. This traffic is generally monetized through Google AdSense.

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.

Unconventional name for a group of Web sites or pages that all link to a central page for the purpose of promoting that one page. Often mistake for a link farm in academic literature written by people trained in Information Retrieval Science but unfamiliar with the concepts of Search Engine Optimization .

The highly risky search engine optimization technique of creating hundreds or even thousands of virtually identical pages that are optimized for specific keyword variants. In many cases, these pages will automatically redirect a visitor to another page on the site that is more likely to result in a website conversion. This is one of the more common causes of the Google Death Penalty. Also known as gateway pages, and sometimes confused with landing pages.

An open-source community management system, built around the use of news feeds and user-based code, that is becoming one of the most popular tools for creating community and social networking sites. Drupal allows an individual or a community of users to easily publish, manage and organize a wide variety of content on a website.

Pages of content, within the same website or across different domains, that are identical. While search engines do not typically penalize for duplicate content issues, they prefer to offer their users unique content. Therefore, search engines will likely choose one of the pages containing duplicate content and rank only that page; effectively “filtering out” the other pages from the search engine’s index. There are certainly exceptions to this, namely when Press Releases are submitted across different wires. Content translated into different languages is typically viewed as unique content.

Web pages generated on demand by databases or similar technology. In the past, dynamic HTML caused serious problems in indexing by the search engines. Currently, however, none of the major search engines have problems with dynamic HTML as long as the URL is not too long or containing too many variables. The opposite of dynamic html is static HTML.

The process which allows advertisers to insert a keyword automatically into their paid search ad. Google Adwords can automatically insert the word in the advertisers' keyword list that was matched to and not the actual search term.

Web pages in which users click-through to a changeable page with content that reflects their keyword search.