Searching on the internet I found various answers ranging from 2% to 12% and one as high as 20%. The interesting thing is they could all be right.

But, the one thing many people fail to take into consideration when looking for this magical number is the idea that it changes based on factors related to the page or search term. Additionally, its importance in the algorithm may also fluctuate based on external influences, such as link popularity, Page rank etc.

If a keyword phrase is unique and the competition in the search engines is low, a much lower or much higher keyword density may work just fine. The overall effect density has on search results is much broader when there is little or no competition. As the competition for a phrase increases, the keyword density target becomes more critical.

In last I just want to say that Keyword density does not affect so much. Our content should be unique. As per my own experience, we can use a keyword density about 6% - 8%. That will not harm the ranking of our site.

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