Case Management

Hello All,
What is a case management and what do they do? How would I get more information on that career? Is there any suggestions on how to get experience one for a person who does not have any experience at all? Would it be best to take case management classes? I am trying to get away form bedside nursing. I have a BSN and currently pursuing a Master of Arts in Health and wellness. I am just looking for Ideas.

Thanks all so much!!
Peaceful nurse