Excel 2007 : VLookup and categorize

Hi, my first post and I'm a bit of an Excel newbie. I've tried searching for the answer for my question but I'v efound nothing that answers it exactly.

what I'm trying to do is, within a workbook I have a sheet that contains a column of keywords, then in the second column B I have a category for each of those keywords and then the third column is a monthly search figure for each keyword. So in summary I have 500 keywords each categorised into about 6 different categories and each with a corresponding search volume.

So what I want to do is create a new sheet that will look for any occurrence of a keyword that falls into a specific category and then return that keyword and the corresponding search volume.

Can someone provide some advice as to how I can do this?

cheers
eddy