This document defines social media as computer-based technologies that allow people to share information, ideas, interests, and other content through virtual networks and communities. It provides a brief history of social media, tracing major developments from the telegraph in the 1840s to the rise of platforms like Facebook and Twitter in the 2000s. The document also outlines key types of social media, their uses including connectivity, education, and promotion, as well as disadvantages such as cyberbullying, hacking, and security issues. It discusses impacts like addiction, reputation damage, and health problems from excessive social media use. Statistics on India's large social media user base are also presented.