One of the most talked about topics in the SEO world is if less really is more. There are many differing viewpoints when it comes down to what the proper keyword density should be for your website if you want to have the best Search engine optimization results.
The basic problem with SEO density is that there is no set guideline that can be researched, only certain rules of thumb. One rule of thumb is that if you stuff your website with too many keywords repeatedly you will be penalized for a lack of integrity which means you will be consider a less authoritative site.
On the flip side other people argue that some keywords are hard not to repeat such as if you have a travel site and need to reference New York City flights or some other keyword phrase often. In the case of a flight deal website you may have to use this term repeatedly to compete with the large tourism websites.
So how can you win? The safest bet is to type in the keyword phrase you intend to use at Google or Yahoo. Take note of the top five-ten results that you see and check the density of these websites. These are your competitors and in order to obtain a slot up in their rankings you will have to shadow their results quite closely. When it comes to the perfect keyword density, this is the best guideline you can follow that offers proven results.