What degree can I get to gain career traction?

I am currently working in service for a company. Looking to grow and eventually transition into a career, and go back to school. What degrees are useful in this industry? New to all of this.

Also if not too personal, what do you make with your degree and what is your position?

EDIT: thanks to all who replied, I have a lot to think about and have been very busy. I will try to reply to everyone as I have time. Thank you all again, I appreciate the guidance