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I have a niche website that focusses on selling pizza delivery bags, the search keywords that are used by users are about 7 and their are another 15 long tail keywords. The question is do i optimize every keyword per one page only? i have a blog on the website www.prodelpizzabags.com/blog/ if i write a blog post that would "compete" internally with another keyword, what should i do, what are the best practices I would be thankful for any insights regarding keyword/page optimization