Google has recently rolled out a new social feature within Music. The new goodie for Google Music is an auto-playlist, one that looks like it will encourage sharing (and maybe even some purchasing), it is called Shared with me. Anyway, this one is pretty simple, any music that you purchase and share using Google
Music Play will show up in the “Shared with me” playlists of the people in your Google+ circles. Of course, the key here — with Google Music your first listen is free which means you can listen to the track and then if you like it, you can decide whether you want to make the purchase.