By default, all your backups are stored in iCloud. The backups include all your data, downloaded apps, and files. If the storage gets full, you might want to clear it up. Let's have a closer look at how you can do that.
In a nutshell: Open Settings ➜ Tap on Apple ID Banner ➜ iCloud ➜ Manage Storage ➜ Backups ➜ Device name ➜ Tap on Delete Backup ➜ Now, Turn Off & Delete.
See it in detail:
Step #1. Open Settings ➜ Tap on Apple ID Banner.
Step #2. Tap on iCloud.
Step #3. Tap on Manage Storage.
Step #4. Tap on Backups.
Step #5. Tap on Device name.
Step #6. Tap on Delete Backup.
Step #7. Now, Tap on Turn Off & Delete.
If you prefer to keep things organized, we recommend you repeat the steps above from time to time. This is the way to make sure you only store the most recent and necessary stuff.?