Standards (ie song standards) serve a purpose for jazz and other musicians I would think, but few originate in the world of Jazz anymore.
The purpose is to have a well known or "standard" point of reference for different artist's to tackle and do their unique thing with that people can recognize and compare with other interpretations.
A lot of jazz focuses on improvising around a main theme, like that which a well known "standard" tune provides. Improvisation is probably most inherent in Jazz compared to other genres. So standards play a particularly important role in the world of JAzz, but one that other genres share as well, but perhaps usually to a much lesser degree.
The purpose is to have a well known or "standard" point of reference for different artist's to tackle and do their unique thing with that people can recognize and compare with other interpretations.
A lot of jazz focuses on improvising around a main theme, like that which a well known "standard" tune provides. Improvisation is probably most inherent in Jazz compared to other genres. So standards play a particularly important role in the world of JAzz, but one that other genres share as well, but perhaps usually to a much lesser degree.