This document discusses the growing popularity of image-based social networks like Pinterest and Instagram. It notes that Pinterest has become the third most popular social network and cements the importance of high-quality, shareable images. Facebook is also moving towards more visual content with changes to its interface. The acquisition of Instagram by Facebook for $1 billion shows the value placed on images. The document provides statistics on user demographics and behaviors on each platform, suggesting brands use these sites to engage customers where they are active and share visual content.