Methods that manipulate the relevancy or prominence of resources indexed by a search engine, usually in a manner inconsistent with the purpose of the indexing system is called Spamdexing.
The sheer amount of information available on the internet is mind-boggling. In 2000 a study indicated that the internet’s search engines where only capable of indexing approximately sixteen percent of available pages. That sixteen percent adds up to pages and pages of potential hits. There are typically ten hits per page. The average internet user never goes farther then the first set of ten. Webmasters use a variety of techniques to increase their ranking. The art and science of making web pages attractive to the search engines is called search engine optimization.