How to change quality settings for android?

Hello! I’m a beginner android game developer in unity… recently I made a game and when I built it and played it on my android device, i found that the gameplay was slow and a bit hanging… i realised that this was due to high level graphics in the game… I did a bit of experimenting on my laptop and found out that the gameplay experience on android wouldnt be affected much if I lowered the quality , and at the same time, i could speeden up the gameplay… any suggestions on how I can do it?? please

Edit > Project Settings > Quality.

There is a whole suite of customization options in there that might be helpful to you