Search Engine Optimization (SEO) | PageRank

On the World Wide Web, a link farm is any group of web pages that all hyperlink to every other page in the group.

Although some link farms can be created by hand, most are created through automated programs and services.

A link farm is a form of spamming the index of a search engine (sometimes called spamexing or spamdexing).

Other link exchange systems are designed to allow individual websites to selectively exchange links with other relevant websites and are not considered a form of spamdexing.