iCloud lets you sync and store all the data that's important to you, from photos and documents to calendars and contacts.
Apple's online storage service, iCloud includes a wide range of features like iCloud Drive for your files, iCloud Photo Library for your pictures and videos, iTunes in the Cloud for your music and movies, iCloud mail for your communications, and even Find my iPhone to track down missing devices. It makes sure everything you have on your iPhone is also available on your iPad and Mac, and even your Apple TV and Apple Watch.
Best of all, if you have an Apple ID (including an iTunes account), you have iCloud. Here's how to get the most out of it!