Index L Link farm A collection of indiscriminate, often unrelated, web sites that link to each other to artificially boost link popularity. Link popularity Refers to the number and quality of inbound links to a web site from other web sites. One of the highest quality inbound links is a link from a major directory such as Yahoo!. Link rot or linkrot A link from a search engine, directory, or other web site that results in a 404 error page after a web developer modifies a web site with new URLs or removes pages from a web server. Index M Meta...