PS Remote Play lets you stream and play your PS4 and PS5 games, switch between games, view your console home screen and browse the console’s menus on any compatible device that’s connected to your broadband network or using your mobile data.
That means you can start playing with your PlayStation console connected to a TV, pause your game and access the PS Remote Play app on your chosen device, and your game will be there, ready to keep playing from exactly where you left it. Or you can switch on your PlayStation console and start playing directly from the app, with no need to ever switch on your TV.
A PS4 or PS5 console is required to stream your games to another devices.