Ask the managers the following questions:

a. What do you do in your job?

b. What do you like most and least about your job? Why?

c. What skills do you need in your job?

d. How much education does your job require?

e. What advice do you have for someone thinking about pursuing a career in management?

Because a manager’s job varies from department to department within firms, as well as among firms, it is virtually impossible to write a generic description of a manager’s job.
If you are contemplating becoming a manager, you may find it very helpful to spend time on the job with several managers learning first hand what they do.