Keyword Density
Keyword Density, expressed as a percentage, is the ratio between the number of times a given Keyword or phrase appears on a web-page, compared to the total number of words on the page.
Keyword density is one of the primary factors in Search Engine Optimization (SEO ). While it seems obvious that the higher the keyword density the better the SEO, too high a density is viewed by search engines as a Black-hat effort and can be penalized.

