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I'm currently working on a site, where there url structure which is something like: www.domain.com/catagory?page=4. With ~15 results per page. The pages all canonical to www.domain.com/catagory, with rel next and rel prev to www.domain.com/catagory?page=5 and www.domain.com/catagory?page=3 Webmaster tools flags these all as duplicate meta descriptions, So I wondered if there is value in appending the page number to the end of the description, (as we have with the title for the same reason) or if I am using a sub-optimal url structure. Any advice?