keywords density

The keyword density test to find out that the URL given in the pages of certain words and phrases in the proportion of the site is compared to all words. The keyword density is important because the more you include a word on the page, the more he reads about the site (of course not good if too many in, because you can get your website search engine optimization penalty). Generally, the words, which are optimized for the site, should be between 2-8% keyword density.