One of the key SEO factors to rank high in SERP is content. The page should have compelling, high quality content that not only attracts interest, but motivates visitors to link to the page and share the link through social media plug-ins like digg, facebook, Delicious.
One of the ways to create great content for search engines is optimized ‘Keyword Targeting’, which helps a search engine understand what a page is about.
Keyword Targeting’ is not about more usage of a keyword term/phrase or keyword density. The Number of Keyword Repetitions on short pages is 2 to 3 and on longer ones, it is 4 to 6. Do not use more or stuff content with keywords than makes sense in the context of the copy.
Watch Matt Cutts on balancing great content with Link popularity