Why a curated backing-track library helps
Jazz backing tracks are most useful when they match the exact job you are trying to do. If you are working on cadence hearing, you do not want to scroll through full standards, and if you are learning a tune, a tiny exercise may be too abstract.
Chord Progressions groups tracks into focused families such as II V I, blues, jazz standards, drumless standards, and bassless standards, so you can get to the right kind of practice faster.