Apple automatically provides every user with 5GB of free iCloud storage. You can use this storage to back up apps, images, videos, or documents. But 5GB fills up fast.
How to Make Sure iCloud Is Backing Up & Syncing Your Data
Most of us have been in the situation where we had to get a new iOS device, and all our photos, notes, and contacts went poof, never to be seen again. If you've felt that pain—or want to avoid it—iCloud is your friend. Cloud storage services, including Apple's iCloud Drive, back up valuable information, documents, and images wirelessly to the internet, where it's easy to retrieve, download or share from any device.