Improvisation over chord changes.
Santana, Grateful Dead, Allman Bros...
Lots of “Rock” has Jazz Influences.
Influence. And sometimes that’s too much and sometimes a little is ok
I’m not a rock fan so as a music fan. As far as jazz, anything before the late fourties, is interesting to me.
And Miles Davis took it around and circled it the other way - giving the mainstream jazz artists the “right” to flaunt their rock influences. It was called fusion - later smooth jazz and it’s Father was Miles Davis.
There is a nice youtube video with Miles Davis playing hoops with John Lennon. Neither of them could score a point. : )