How to describe jazz in one sentence?

Jazz covers all chromatic scales, but not all of them are used in every song. We still have to consider the feelings and themes expressed. Therefore, jazz is divided into many sub-categories, and the harmony is brought to the extreme. The melody can be described as all-encompassing, including Charlie Parker's jazz and Bill Evans's jazz. The arrangement of chords in jazz is complex and dense. When improvising, musicians need to concentrate on the rhythm of drummers and bass, pay attention to the direction of chords, and feed back the scales and beats stored in their brains. They are by no means fooling around, and they have no time to shake hands and pose on stage. So the threshold for interpreting jazz is actually very high.