The company looks at traffic arriving on 200,000 sites, and measures who sends it there. Over the last year, Shareaholic, says, Facebook, Pinterest and to a lesser extent Twitter have come to dominate where traffic comes from on the web:
These three social media power players collectively accounted for 15.22% of overall traffic last month. Given their community and share-friendly nature, it's no surprise that they top the list in traffic referrals and have grown more than 54% each in share of overall visits. Facebook grew 58.81%, Pinterest by 66.52% and Twitter 54.12%. Pinterest's growth is especially interesting now that the company is flirting with paid advertising.
Unfortunately, Google+ still isn't having much of a comparative impact, Shareaholic says.
Google+ isn't yet competitive. Although Google+ referred a fair number of visits to online publishers last month (0.04% is a substantial number when we're looking at a data set of hundreds of millions of visits), it is hardly a leading referral source. Google+ is consistently dwarfed by the competing social media sites.
Here's the data: