There is a pervading myth that by inserting words you think are relevant to your site in your keywords meta tag, you will automatically improve your search engine ranking. The truth is that only a select few search algorithms utilize the keyword meta tag. Keyword Density SEO Tool calculates relevant keyword phrases by analyzing ALL of the words on the page, not just the meta tags. Keyword Density SEO Tool factors phrases, not just keywords. When a certain phrase appears more than once, Keyword Density SEO Tool then calculates the "Keyword Density" of that phrase. The keyword density is the ratio of the phrase to the total number of words, adjusting for the number of words in the phrase. This way, you are analyzing both the keyword density and the proximity of keywords at the same time.