by Tom Trotts Image by websuccessdiva via Flickr Keyword density is an indicator of the number of times the selected keyword shows in the web page. But mind you, keywords shouldn't be over used, they should be just sufficient enough to appear at important places. If you repeat your keywords with every other word on every line, then your site will probably be rejected as an artificial site or spam site. Keyword density is always expressed as a percentage of the total word content on a gi...