Usually played with saxophones, trumpets, a piano, a guitar, a bass guitar (or upright bass) and a drum kit, but it's sometimes played with strings (violin, cello etc.). You can also have vocal parts as well.
It first originated at the beginning of the 20th century, in central America. It was largely associated with African Americans, but is played by everyone nowadays.
A well known Jazz player and bandleader was Art Blakey (drummer)