Samsung Device Maintenance is an app that helps you keep your Android smartphone in tip-top shape. All you have to do is tap the 'Optimize Now' button, and the app will shut down all the apps running in the background, freeing up space on your smartphone and scanning for other issues.
With Samsung Device Maintenance, you can also check the status of your smartphone's battery. You can see how much battery all the apps are consuming and, if you want, activate a battery saver mode.
Samsung Device Maintenance is an excellent optimization app that's designed specially for Samsung smartphones. That said, the app may not work correctly on some Galaxy smartphones.