Matt Cutts, boss of WebSPAM at Google, tells us what we need to know about keyword density.
Keyword density used to be considered an important part of SEO copywriting by most online marketers, but analysts like Matt Cutts will tell you that people seem to be putting too much stock in keyword density these days. With importance being placed on this idea people begin to share misinformation regarding keyword density. For example, some still believe that their desired keywords have to appear a certain number of times in order to give them the optimal ranking on Google or any other search engine. According to Cutts, this is not the case at all. There is no hard and fast rule to keyword densities. With the semantic web and Google AI, Keywords have given way to topics, entities and user query intent.