What are the duties of a manager?

Answer

There are many specific duties that will vary widely depending on what type of activity the manager is responsible for. But in general terms, managers are usually responsible to ensure that the people assigned to them are doing their tasks correctly. The definition of "correctly" is where there is a good degree of variation from job to job, but it usually involves managing a budget for the people assigned to the manager, ensuring that the tasks of those people are completed on whatever schedule has been established, working through personnel issues like training if necessary, salary issues, bad performance, etc.