An Apple ID is the personal account you use to access Apple services like the App Store, iCloud, Messages, the Apple Online Store, FaceTime, and more. It includes the information you use to sign in, as well as all the contact, payment, and security details that you’ll use across Apple services.

Any time you set up a new device, make a purchase, or use any Apple service, you will be asked to sign in with your Apple ID and password. Once signed in you’ll have access to the service and all the personal information in your account. Use the same Apple ID everywhere you sign in to ensure that all your Apple services and devices work together seamlessly and you can access your personal content from all your devices.