This document discusses social media and provides information on various topics related to social media. It defines social media as interaction among people who create, share and exchange information and ideas in virtual communities and networks. It lists popular social media tools like WhatsApp, Twitter, Facebook, Instagram and YouTube. It provides details on the founders of these popular sites and statistics on their users. It discusses mobile platforms for social media and provides some usage facts. It also outlines both negative effects like distraction and potential for psychological disorders and positive effects like helping conversations and exchanging information.