When it comes to referral traffic from social networks, it is no surprise that Facebook is the undisputed no. 1. According to Shareaholics, 10% of the traffic on websites from 200,000 publishers comes from the world's largest social network.
Behind Facebook though, there are a couple of surprises.
Firstly, it may be considered a surprise that Pinterest beats Twitter for the no.2 spot, given the key role that Twitter allegedly plays in the spreading of online news. What's really astonishing though is the apparent irrelevance of Google+ as a traffic source for online publishers. According to Shareaholics, Google+ is the source of no more than 0.04 percent of publishers' website traffic.