This document provides an overview of several popular social photo sharing platforms and their business uses. It summarizes engagement statistics for Facebook, Instagram, Snapchat, and Pinterest, finding that over half of internet users now upload photos online. Facebook posts containing photos receive far more engagement than other content. Instagram has over 150 million monthly users who are highly engaged. Snapchat and Pinterest also see large user bases and engagement. The document concludes with recommendations for using social photo sharing platforms for business, including understanding your audience and giving them behind-the-scenes access in a personal way.