How Much Keyword Repetition is Optimal?
Well, getting right to the point, there is no exact answer for this. However, one thing we can definitely say is that you must not over-stuff your article with keywords. Because search engine algorithms now check out keyword density and relevance as well. So it will not be impressed with the same keyword appearing in every other sentence, and it will not rank your page very well in the search results.
Being overzealous with your keywords aside though, keywords are still essential for Search Engine Optimization (SEO). So it is certainly advantageous to your web page / website to use keywords for SEO. Read more