The social audience is growing across networks and countries. That is the takeaway from GlobalWebIndex’s “Stream Social: Quarterly Social Platforms Update.” The study found that Facebook remained the No. 1 social network worldwide, with just over half of internet users logging on to the site at least once a month in Q1 2013. eMarketer puts worldwide Facebook penetration slightly higher, expected to reach 60% of internet users this year.Behind Facebook, there was a crowded field of second-place contenders, with Google+ out front at 26% of internet users. In the US, Google+ gets limited attention, though its user base is growing. Worldwide, however, Google+ has been much more successful. Given that YouTube was right behind, in use by one-quarter of active internet users, there’s no question that Google, which owns YouTube, is giving Facebook a run for its money in the global social network space.

via Which Social Networks Are Growing Fastest Worldwide? – eMarketer.