If something were to ever happen to your phone such as losing it, damaging it where it can no longer be used, or getting it comprised, you want to make sure your data and information can be transferred to a new device. By backing it up to the cloud you can restore your information to a new device. Follow these steps to make sure your data is backed up.
When iCloud backup is turned on your iPhone backs up daily when connected to power, locked, and connected to Wi-Fi.