This document summarizes statistics about major social media platforms as of 2012. Facebook had over 845 million monthly active users worldwide. Twitter had over 500 million users and saw 340 million tweets sent daily. LinkedIn had over 161 million members across 200 countries. Google+ had over 90 million users. Instagram was growing rapidly, seeing one new user join every second and approximately 58 photos uploaded each second. Pinterest was becoming increasingly popular, with 11.7 million monthly active users, many of whom were women. The document provides additional statistics on user demographics, mobile usage, and growth trends for these and other emerging platforms like Foursquare.