Thanks for all replies. According to SEOMOZ onpage optimization help I should optimize the page onpage for the keywords that has a C, D or F. Reading the replies you guys advice me to not optimize it for these keywords in order to create a A or B in grade?
For e.g. the landing page is domain.com/cheese the page is ranked for keywords like cheddar cheese, normal cheese, old cheese, diet cheese. The content on the landing page is about how and where to buy "diet cheese" in general and in some way this landing page does rank for:
cheddar cheese on #5
normal cheese on #3
old cheese on #7
diet cheese on #2
SEOMOZ Onpage optimization tells me "diet cheese" has a grade of A, "normal cheese" a grade of D, "old cheese" a grade of D, "cheddar cheese" a grade of F.
It's clear why "diet cheese" has a grade of A, simply because that's where the content is about. But the other keywords are ranking pretty well in the serps and getting pretty good traffic though. How should I optimize this then, should I optimize it according SEOMOZ Onpage suggestion? As it mention that when having keywords that already ranking well and has good traffic, BUT a onpage optimization grade of C, D or F, it could win a lot of efforts when rising in the serps after working on the onpage optimization to a grade of A or B.
I hope I have clarified it better now about my question
Thanks again, Mozzers!