Welcome to iCloud. The Apple ID for your iCloud account is xxxxxxxxxxxxxxx and its what youll use to get your iPhone, iPad, iPod touch, Mac, and PC set up. Just follow these instructions and youll be up and running in no time.
Once iCloud is set up, it stores your content and wirelessly pushes it to all your devices. For example, buy a song with iTunes on your computer, and it will appear on your iPod touch and iPad. When you snap a photo on your iPhone it will automatically be sent to your iPad. You can start creating a Pages document on your iPhone, and put the finishing touches on it from your iPad. Theres no need to dock or sync to your computer. With iCloud, it just works.