Cool jazz is a subgenre of jazz that developed in the 1940s and 1950s. It is characterized by its relaxed, mellow sound, and its focus on improvisation. Bebop is another subgenre of jazz that developed in the 1940s. It is characterized by its fast tempo, complex harmonies, and virtuosic solos.
Cool jazz and bebop are both subgenres of jazz, but they have different characteristics. Cool jazz is more relaxed and mellow, while bebop is more complex and virtuosic. Cool jazz is more likely to be influenced by classical music, while bebop is more likely to be influenced by African-American folk music.