The Saved Games service gives you a convenient way to save your players' game progression to Google's servers. Your game can retrieve the saved game data to allow returning players to continue a game at their last save point from any device.
The Saved Games service makes it possible to synchronize a player's game data across multiple devices. For example, if you have a game that runs on Android, you can use the Saved Games service to allow a player to start a game on their Android phone, and then continue playing on a tablet without losing any of their progress. This service can also be used to ensure that a player's game play continues from where it left off even if their device is lost, destroyed, or traded in for a newer model.