Settings is where you can change your language, toggle game sounds and vibration, change your notification options, choose your graphic quality, and enable or disable shadows.
In addition, there are a few more options to personalize your experience further:
FPS and ping indicator
If on, it shows you your FPS and ping information.
What is "FPS"?
FPS, or Frames Per Second is the number of frames rendered by the game in one second. The higher the FPS, the smoother the video motion, as images are refreshed more often.
Why you need to know your FPS
It will help you to understand what graphics settings you should use. If your FPS is low, setting the Graphic Quality to Good or High instead of Ultra can help. Disabling Shadows might also do the trick.
What is ping?
It shows how long it takes for data to be sent from your device to the server, and then back to your device. If the ping is high, you are more likely to experience lag.
This option allows you to set the FPS limit to 30 or 60.
Choosing 60 FPS ensures excellent visuals but also intensifies the work of your device. Thus, if you'd like to save battery and decrease the device's heat, setting the limit to 30 FPS is advisable.
This describes how quickly you can turn your camera. Higher sensitivity can help you turn around faster, but lower sensitivity can make it easier to aim. Experiment to find the balance that's right for you.