what should be the maximum keyword density for a main keyworid phrase right now it is %15.33 . is this too high or too low please help me soon.
I'm not sure if there is an optimal keywords density. I think, the best use of keywords is when they are in "naturals sentences", grammatically correct. Pages overloaded with keywords, I think, don't do so well and I guess it will be even more true in the future.
i think search engines donot know grammar and i think they judge by the number of words , eg if a particular word is used more than a limit SE consider that a spamming so i think there is a limit because SE follow a algorithm so i think the limit is given in terms of keyword density so please if anyone finds a number please post it here thanks
I think search engines know grammar better everyday and will continue to improve. Google especially with his "Book Search" must have learn a great deal on grammar, syntaxis and natural structure of languages. And IMHO, I think Google (and others search engines) are eager to learn more on thoses topics. If you only want a number, I give you this one : 7. It's my lucky one, but I'm sure it's no more accurate that any others