Getty Images-Dimitri Vervitsiotis
It was another evolutionary year for social media as worldwide usage of social media ramped up dramatically and leading social networks tweaked their tools.
Top trends for 2012 included sharp growth in mobile video, social commerce, and business social networks.
The overarching story, though, continued to be the remarkably innovative ways people worldwide are using group collaboration tools to impact government, education and culture.
Read more in our summary of the top 12 trends influencing social media news in 2012.