This document provides an overview of how social media has changed marketing from outbound interruption-based approaches to inbound approaches where interested customers seek out information. It discusses the difference between old "outbound" marketing like print ads, mailers and cold calls versus new "inbound" marketing like search engine optimization, blogs and social networks. Specific social media platforms like Facebook, Twitter, LinkedIn and Foursquare are explained along with tips for setting up business profiles and pages on each platform. The importance of video, analytics and search engine visibility are also covered.