In music, what does allegro mean?

In musical terminology, tempo ("time" in Italian) is the speed or pace of a given piece. In classical music, tempo is typically indicated with an instruction at the start of a piece (often using conventional Italian terms) and is usually measured in beats per minute (or bpm). In modern classical compositions, a "metronome mark" in beats per minute may supplement or replace the normal tempo marking, while in modern genres like electronic dance music, tempo will typically simply be stated in bpm.

Allegro is an indication to sing, play an instrument or conduct music in a quick, lively tempo. Tempo is the speed or pace of a given song or section of music, indicating how fast or slow you should play the music. Tempo is usually measured by beats per minute. Tempo is changeable and can be dictated by a conductor or beat keeper, like the drummer of a band.