By the time you finish the Tutorial, you should automatically connect to Google Play service, which will keep your data saved as long as you’re logged into that account on a device.
If you want to migrate your data from one device to another, log in on a new device with the same Google Play account - this should restore all your game progress on another device.
Connecting your Facebook is a great idea as well, since it can act as another means of restoring your account - or even be used when you’re migrating operating systems, to ensure you start right where you’ve left off.
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