What is the use of Apple's mobile phone backup?

System: iOS 15. 1

Apple's mobile phone backup can back up the information in the mobile phone, including important information such as address book, SMS, call records, application software, games, etc., to prevent data loss. Taking iPhone 12 as an example, the steps to start the backup of Apple mobile phone are divided into four steps. The specific operation is as follows: 1 Click AppleID. In the phone setting interface, click Apple ID.

2 click iCloud in the AppleID interface, and click icloud.

3 Click on Cloud Backup

4 Open the cloud backup