The value of social media is that you learn about music that you might like. The new social media feature in iTunes 10, called Ping, lets you know what music your friends are listening to and purchasing. But in using Ping, you have to decide how much you want others to know about your own listening and purchasing. A very helpful article on Macworld explains the privacy features in Ping. It's worth checking out if you're intending to enable Ping, which is turned off by default.