Your Apple ID is the user name for a free account that lets you access Apple services, such as the iTunes Store, the App Store, and iCloud. You need only one Apple ID for everything you do with Apple. There may be charges for services and products that you use, purchase, or rent.
If you have an Apple ID, use it when you first set up iPad, and whenever you need to sign in to an Apple service. If you don't already have an Apple ID, you can create one when you're asked to sign in.
Create an Apple ID. Go to Settings > iTunes & App Stores and tap Sign In. (If you're already signed in and want to create another Apple ID, first tap your Apple ID, then tap Sign Out.)
For more information, see support.apple.com/kb/he37.