What defines a property manager?

A property manager is primarily involved in the leasing, operation, and oversight of rental properties on behalf of owners. This role encompasses several responsibilities, such as marketing rental units, screening tenants, handling lease agreements, collecting rent, and maintaining the property. While leasing is a key aspect of a property manager's duties, they also engage in the overall management and upkeep of the property, which may include maintenance coordination and ensuring compliance with local regulations.

In contrast, the other definitions do not accurately capture the full scope of a property manager's role. Selling properties is specific to real estate agents, while managing multiple real estate companies pertains more to executives or corporate managers rather than property managers. Therefore, the focus on leasing as a core function truly reflects the essence of what a property manager does, making it the most appropriate answer.