The document discusses various social media platforms and how they are used by librarians. It provides details on the major social media sites like Facebook, Twitter, Flickr, Foursquare, LinkedIn, Pinterest, Blogging, YouTube, and Google+. It notes key statistics about the users and features of each platform. The document encourages librarians to explore social media in order to understand where customers are and stay current, but also notes that it is not required. Help is offered to anyone wanting to try social media but feeling unsure.