It is better you do not make any changes to the engine settings if you do not have much knowledge. Also, you can set the display quality as Auto, Smooth, Balance or HD. In the settings, you can set the resolution as SD (720p), HD (1080p) or 2K. You can improve the performance of the game by tweaking the Buddy settings, as the emulator is always on development there is much room for improvement.
Don’t get confused that TGB is only for PUBG Mobile but actually you can install any APK along with the OBB if needed on the TGB and play all the hardcore mobile games on Windows. TGB and now Gameloop, Being an Android gaming emulator you can expect it to be highly optimized to run even on low-end Windows PC. The Gaming Buddy is able to handle high-end games. The developers of PUBG created Tencent Gaming Buddy (now Gameloop), the emulator specifically cater to mobile gaming on PC.
You can run the Android OS on the Windows and Mac PC for free with emulators.
For running smartphone Apps on PC, the emulator behaves like an Android system that can be installed on the Windows and the Apps from Store are installed on the emulator. An Android emulator is a software that allows one computer system to act like another computer system.