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Women make up over half of all social media users at fifty-six percent, and they hold sway over emailing, instant messaging, blogging and photo sharing, as well.

Demographic Profile of US Internet Users Who Would Buy a Brand Because a Friend "Likes" or Follows it on a Social Network, March 2012 (% of respondents in each group)

Facebook’s prominence was on display in Q2 2012 data from social login platform Janrain. When asked about the primary social network used to share content, 53% of social network users worldwide said Facebook, 41% said Twitter and only 4% said LinkedIn. This is about the same as in Q1 2012, when 54% used Facebook to share content, while 39% used Twitter, and 3% used LinkedIn.