Intro to Jedis (Redis Java Client)

What is jedis? what is Jedis pooling? To learn more about Redis, Jedis, and Spring Data Redis enroll in my complete course with special coupon:
https://docs.google.com/document/d/1MlTWGrFxhVthaDB-nrRnc94qp2sli8Vti4PtFJGU6hc/edit?usp=sharing