This document discusses social media marketing. It begins by defining social media and listing some major social media platforms like Facebook, Twitter, Google+, LinkedIn, and Instagram. It then discusses the history of social media and how it has evolved from letters and telegraph to today's platforms. Some key social media statistics and trends are also presented. The document also provides examples of how businesses can use social media for objectives like communication, customer service, research, reputation management, and sales. It concludes by presenting a case study of how a small business called Concept Women Footwear used social media successfully to increase their sales and customers.