Social media's largest ###### of revenue is advertising. The ###### from social media ad sales ###### expected to reach $32.9 billion ###### the end of 2016. It ###### reach about $41 billion by ######.

Social Media And Politics

Social networking sites play a ###### role in shaping the political ######.]]>
On June 12, 2009, the ###### House announced it was joining ######, Facebook, MySpace, YouTube and Flickr. ###### Obama said joining the social ###### sites would help "reform our ###### so that it is more ######, more transparent and more creative."]]>