This document provides an overview of social media for marketers. It discusses what social media is and why it matters for brands. Key statistics on social media usage are presented, showing the large percentage of people using platforms like Facebook, YouTube, and Twitter. The document also discusses metrics for evaluating social media performance and ROI. Several case studies are examined, including examples of both successful and unsuccessful social media campaigns from companies like KitchenAid, Netflix, and NBC. Overall takeaways focus on the importance of being transparent, nimble, listening to customers, and creating compelling content.