Ping is Apple's social network built into iTunes and focusing of sharing your musical interests. If you've used Facebook or Twitter, Ping will seem basically familiar.
In order to use Ping, you must have iTunes 10 or higher and an iTunes account. Get those if you don't already have them and then return to this page.
To begin setting up Ping, open iTunes. There are two ways to reach Ping, from the left-hand tray in iTunes (shown in the image above) or by going to the iTunes Store and clicking the Ping menu item at the right of the menu bar at the top.
Do whichever you prefer.