What is iCloud?
Photos
For many of us, Photos is the killer app of iCloud: by storing all our images and videos in the cloud it doesn’t matter what device we’re using when we want to look at or edit our photos and movies: they’re available on our Macs, iPhones, iPads and Apple TVs. It can make sure your photos don’t take up too much room on any device, and it also enables you to share your photos with friends and family.
Two-factor authentication
Your various iCloud services use the familiar Apple ID and password,
