Keyword Density is the occurrence of a phrase or keyword on a webpage, expressed in percentage, compared to the total number of words on that page. Search engines use this data to determine whether a page is relevant to a specific keyword phrase
WordContOnline's Keyword Density tool is a very handy SEO resource, which helps users in creating search engine – friendly content.
This tool also brings forth a number of opportunities:
Greater word variation helps in boosting the rank for a broad spectrum of words and decreases the chances of a page being filtered out.
Just copy and paste a text and the density of various keywords, within the text is displayed instantly. It also provides other details pertaining to the text.