Keyword Density – SEO WIKI
Keyword density is the ratio of key phrases to text volume.
For search engines, the presence of keywords is important, since they determine the ranking of the page in the search results, as well as the grouping of pages by topics. But if an excess of keywords is found on the page, the text is spammed, then the search engines will respond by lowering the page in the search results or by deleting it completely. Therefore, it is important to observe a certain density of keywords.