What does the lick mean in jazz?
In popular music genres such as country, blues, jazz or rock music, a lick is "a stock pattern or phrase" consisting of a short series of notes used in solos and melodic lines and accompaniment.
Should you learn jazz licks?
Learning licks has many benefits.
It helps you micro focus on a small piece of language, as opposed to the macro version of learning an entire solo. Learning a lick is something that can be done in one practice session. It can be a quick win and a good days work.