Repeatedly click the black box when the timer counts down to 0. After one second, the counting stops, and the number shown next to "clicks" is your clicks per second, or cps.
This is a clicks per second timer. A clicks per second timer is a way to tell how fast you are clicking by measuring the number of times that you click in a second. It is also used to tell how good you are at mashing, which is commonly used in fighting games.
