An administrative manager oversees the work of the entire administrative staff at a company or organization. They set goals, delegate, and coordinate tasks, organize schedules, manage databases, and create reports on administrative processes.
Administrative managers perform clerical duties themselves, but they also communicate and coordinate work with other departments and their managers. They are responsible for recruiting ad training administrative staff as well.
This is a management level position, and as such, it requires adequate education and experience. A degree in business administration is usually required, as well as years on the job in administrative positions, although learning how to be a good manager is not something you can acquire through conventional training. But you will get there with a lot of trial and error and a lot of courage. And do not be surprised if you are not complimented for doing well. As long as the numbers and productivity statistics are right, it is most likely all that will matter.