What title is given to a person who directs and/or supervises the affairs of a business or organization?

The title "Manager" is given to a person who directs and/or supervises the affairs of a business or organization due to the breadth of responsibilities typically held by individuals in management roles. Managers are primarily tasked with overseeing daily operations, leading teams, assigning tasks, and ensuring that organizational goals are met. They play a critical role in coordinating resources, both human and material, and often engage directly with employees to motivate and guide them.

In contrast, while "Director" implies a level of authority and strategic decision-making, and "Administrator" denotes management over administrative processes, these roles can vary significantly in scope and focus. "Supervisor" typically refers to a position that oversees specific teams or departments, often with a narrower scope than a manager. Therefore, the term "Manager" is the most encompassing title that accurately reflects someone who directs and oversees an entire business or organization’s operations.