2012 was a huge year for social media – its biggest yet – with Facebook, Twitter, LinkedIn, Pinterest and (gasp) Google+ all marching to record numbers of global active users.

All of which, of course, is good news for social media marketers and their clients, who have invested heavily in these platforms. The smart money is still going into the pockets of Facebook, Twitter and LinkedIn, but which of these thoroughbreds is winning the race?

For B2C marketers, Facebook continues to convert better than any other social platform, although its lead is waning. Twitter is closing the gap, and LinkedIn is still the business social network of choice for B2B marketing.

(Source: Brafton. Social media image via Shutterstock.)