Mlot, Stephanie. "Social Media Use Exploded in 2012, Led by Pinterest." PC Magazine, December 3, 2012.
From the article: "Consumers spend more time on social networks than any other site — about 20 percent via a PC, and 30 percent using a mobile device, Nielsen's Social Media Report revealed.
Still not impressed? The report also tips a 37 percent increase in the total time spent on social media in the U.S., reaching 121 billion minutes in July, compared to 88 billion in summer 2011.
The ultimate social network, Facebook, remains the most-visited in the U.S., and earned the title of most popular Web brand in the U.S. this year. It reached 152.2 million PC visitors, 78.4 million app users, and 74.3 million mobile Web surfers. That dwarfs social sites in all categories (see graphic below), beating No. 2 Blogger by more than 93.7 million PC users. In the mobile app race, Facebook, Twitter, Foursquare, Google+, and Pinterest carry the top five spots." Read more
See also
"The State of the Media: The Social Media Report 2012." Nielsen, 2012.