metronome

Hello all, I am glad to find this site. Btw I am new here but this website is very interesting. Can somebody explain me how to set metronome in standard tempo. I got difficulties when i use metronome, sometimes it is too fast but sometimes it is too slow. And I couldn't know how much i should set the number of the speed.

Just click the orange arrows to move the metronome 1 bpm at a time.