The document discusses social media and defines it as internet-based applications that allow users to generate and share content. It provides examples of different types of social media like social networking sites, social bookmarking, social news, social photo/video sharing, and wikis. The document compares traditional media to social media and notes how social media allows for more interaction between users, greater reach, frequency, accessibility, usability, and immediacy compared to traditional media. It also outlines some common benefits and challenges of using social media.