Part 1 · Getting Started · Chapter 8
A metronome clicks a perfectly steady beat. Playing with one trains you to keep steady time, which is the most important job a drummer has.
Tempo is measured in beats per minute (BPM). 60 BPM is one beat each second. Most songs are somewhere between 70 and 140.
Quarter notes at 60 BPM. Try to make your stick land so exactly on the click that the click disappears.
When you are perfectly in time, the click gets hard to hear because your note covers it. That is the goal.