Take Control of Your Apple ID, 3rd Edition -Version 3.5.1

Your Apple ID is much more than a simple username. It's a key that unlocks a long list of Apple products and services on any of numerous devices. iCloud uses an Apple ID, as does Apple Music; the App Store; the Music, TV, and Books apps; and more. An Apple ID protects your personal information, including email and iOS/iPadOS backups; helps you find a lost iPhone; and can even unlock your Mac. So it goes without saying that if something goes wrong with your Apple ID, you could be in for a world of hurt.