In the Installed section, you will find a list of games that have been successfully installed on your device. You can quickly launch any of these games directly by clicking on Play now tab. This section allows you to conveniently manage your game collection when you feel like playing something specific.
You can also update games from My games section just by clicking update tab.
If you have downloaded a game once, it will be saved in "My Games," ensuring that your game list remains accessible at all times, irrespective of the platform. However, it's important to note that you can only install the game on each platform if it is compatible with the system.