What is the pace or speed of a piece music called?

The pace or speed of a piece of music is called its tempo. Tempo is an Italian word that means "time" and is used to indicate how fast or slow a piece of music should be played. It is usually measured in beats per minute (bpm) and can range from very slow (e.g. 40 bpm) to very fast (e.g. 200 bpm). Tempo can be indicated in a piece of music by a metronome marking, which specifies the bpm, or by a written tempo marking, such as "adagio" (slow), "allegro" (fast), or "andante" (moderate).