The document discusses using social networking tools to build a personal learning network (PLN). It defines what a PLN is and lists many popular social media sites that can be used, such as blogs, wikis, Twitter, Facebook, YouTube, iTunes U and podcasts. The document provides advice on getting started with a PLN, recommending choosing one or two tools like Twitter and RSS feeds to follow blogs. It also describes features of different social media and how they can be used for networking, sharing ideas and staying connected to learn from others.