Probably one of the most debatable topics in search engine optimization is keyword density, defined as the ‘relative amount frequency of a particular keyword or phrase to the total number of words in a web page.’ So heated have the contentions been that even people considered to be SEO experts can’t seem to get down to a consensus about its use.

Like most other search engines, Yahoo ranking relies on a complex ‘interpretation’ program that assesses the relevance of your site content to search queries. Yahoo reads your text, its titles and descriptions, its sources, associated links, and other distinctive document elements.