DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/4jjhh6/global_social) has announced the addition of the "Global Social Networking Market 2015-2019" report to their offering. The global social networking ad-spending market to grow at a CAGR of 23.12% during 2014-2018. Social media is not limited to Facebook, Twitter, and Google+. Currently there are more than 800 active social networking sites and several platforms, including mobile applications and digi