The document discusses social media and provides data about engagement and return on investment. It notes that the average Facebook page only reaches 12% of its fans organically and that Facebook recommends buying ads to increase reach. Engagement on Facebook posts is also typically low, with 0.4% of fans commenting and 3.4% liking on average. The document concludes that social media is what others say about a company, not what a company says about itself, and provides examples of how companies have benefited or been harmed by viral customer posts.