If you want to be able to offer or receive remote assistance with your device, you can use the Vysor Share module to either view someone else's screen or let them view your own screen. This gives you the ability to control your Android device with your keyboard and mouse, so it offers a level of control that is hard to replicate with touchscreen gestures. You'll be able to play games, use apps, and perform any other activities that could be done directly through the Android mobile device.
Overall Opinion: If you want to control your Android device from your desktop computer, Vysor is the best way to make that happen.