This document discusses social media and its use in marketing. It defines social media as a social instrument of communication on the Internet that allows people to share opinions, experiences and information. Social media has changed how people interact and how businesses operate, bringing new marketing methods. The elements of social media are divided into six categories: content creation, content sharing, networking, joint productions, virtual worlds, and plugins. The advantages of social media include easy communication and networking globally. Disadvantages include the time needed to engage actively and privacy/impression concerns. When using social media for marketing, companies should listen to customers, engage and adapt content, participate in conversations, and continue updates and content sharing.