Retail store managers, store supervisors are responsible for overseeing the daily operations of a retail store, including product availability and pricing. Other duties entail managing the staff and customer services, and controlling finances. They may also train new employees and schedule shifts. A store supervisor is a manager within retail or department stores. The responsibilities of a store supervisor are various, depending on the size and type of store. They oversee employees, supervise sales, maintain inventory, and provide customers with goods and services.