Jazz is a music genre that originated in the African-American communities
of New Orleans,
Louisiana in the late 19th and early 20th centuries, with
its roots in blues and ragtime.
Since the 1920s Jazz Age, it has
been recognized as a major form of musical expression in traditional
and
popular music.
Jazz is characterized by swing and blue notes, complex
chords, call and response vocals,
polyrhythms and improvisation. Jazz has
roots in European harmony and African rhythmic rituals.
[Copied from
https://en.wikipedia.org/wiki/Jazz on 22/07/2022]