I have a speed of 5 clicks per second which I tried on an online click speed tool. As I wanted to be a professional gaming shooter, I want to improve that ratio.
If anyone can guide me, how can I increase my score?
Make and model of your mouse? I used that same link and I got 51 clicks in 10 seconds with a Dell-MS116 mouse. I think it's more about practice and training your fingers, not the hardware though hardware is part of that equation.