This document provides an introduction and overview of Army social media. It discusses how the communication revolution and rise of social media has changed how information spreads and how the Army has adopted a proactive approach to social media engagement. It defines Army social media as including social networking sites, media sharing sites, blogs, and microblogs used to communicate with larger audiences faster. The document explains that Army social media impacts all members of the Army family as an important tool for messaging and outreach both within installations and to external audiences.