Allegro is one of the types of musical “moves”, ie the time, speed at which a song or part of it will be performed. Traditionally, the terms are used in Italian, which is a kind of “universal language” of music. Thus, "allegro" or cheerful indicates a faster tempo (speed) song, as opposed to a "walker", which would be a comfortable and paced "walk" or a "moderato" (moderately). There are dozens of other musical moves, such as broad, bass, vivace or presto.
