This document provides an overview of the origins and evolution of social networks from the 1960s to present day. It discusses early networks in the 1970s and key platforms that launched in the early 2000s like Friendster, LinkedIn, and Facebook. The document also examines Google+ and the future of social networks. It analyzes the value of social media marketing for businesses and provides tips for effective social media use in 2013, focusing on relevance, visuals, helping clients/readers, analytics, events, and concentrating efforts on top platforms.