"In the Search Terms fields, sellers are given the opportunity to provide 5 key terms or phrases. More often than not, sellers choose words that already appear in their Title, Brand and Manufacturer fields. This is not necessary. Amazon’s system automatically includes Title, Brand and Manufacturer when determining search relevancy.
Instead, come up with new and inventive words that relate to the product at hand."
So having the title keywords will do no good? Would it rank better if we put the same anchor texts in keywords and the title?