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Hi Nuroa, You could use rel=Canonical tab, this code help you in telling Google which page to count. You can also use rel="canonical" and "rel=prev/next" together for pagination problem. You can simply use rel=prev/next with the base URLs, and then rel-canonical to the page level. Besides, this post can give you more idea about this issue: http://www.seomoz.org/q/avoiding-duplicate-content-in-e-commerce-product-search-sorting-results I hope this helps

Check out this article here: http://www.youtube.com/watch?v=pCz5ELUKGBk&NR=1 In it, Rand says that if you have quality fans (or followers in Twitter) who are sharing your stuff then this is helpful: Quantity of Friends/Followers - like links, it's likely the case that more is better, though there will likely be caveats; low quality bots and inauthentic accounts are likely to be filtered (and may be much easier to spot than spammy links, due to the challenge they find in getting any "legitimate" friends/followers). Importance of Friends/Followers - the friends/followers you have, like the link sources you have, are also probably playing a role. Earn high "authority" followers and you yourself must be a high authority person. Analysis of Friends/Followers Ratios - Much like the engines' analysis of the editorial nature of links, consideration of whether a social user is engaging in following/follower behavior purely out of reciprocity vs. true interest and engagement may be part of authority scoring. If you have 100K followers and follow 99K of them, but the engagement between you and your followers is slim, you're likely not as authoritative as an account with 100K followers + 5K following, but those followers are constantly engaged, retweeting, liking, sharing, etc. In my opinion, the most valuable thing you can get from facebook is when people click the like button on your website to share your stuff with their facebook friends.  I think having fans is good - but mostly for social interaction with you and your brand.  I think it helps when someone clicks "like" on a facebook post but I don't think it has a huge impact in the serps.