Open Settings Look for Backup. Might be under google/google account//system etc. Make sure Google account is selected, and it's backing up categories of info
Use this to visualize how accounts work in an iOS device and syncing multiple data types with multiple accounts https://docs.google.com/drawings/d/1KD9J0GzJ9k1t9auXa0kXn7y9HdQFyCEE-PXsctGfFCM/
Do I need to have a backup? Throw your computer/electronic device out the window, and then ask yourself do you want to get access to anything that was once on your device. If you say "OMG, I need xyz back!", then you need to have a backup solution. ...