Social media use on the rise with mobile

Dec 04, 2012, 4:10 PM EST
Persons pick up mobile phones displayed at the 'Free Center' store of French internet service provider Free Mobile, on its opening day, on June 26, 2012 in Paris. The 640-square-meter size 'Free Center' store in Paris is Free Mobile's eighth store to open in France and one of Europe's largest stores to be opened by an internet service provider and mobile phone operator, rivalling the Apple Stores of US tech giant Apple. Free Mobile is to open about twenty 'Free Centers' by the end of 2012.
AFP/Getty Images/Kenzo Tribouillard

Nielsen's study reveals that U.S. users spent 121 billion minutes on social media sites this year, with Facebook as the most highly used. Pinterest saw explosive growth, but all social networks are gaining boosts in user counts with the continued proliferation of smartphones and tablets.