A more thorough explanation:

Definition: A postmaster is an official of the United States Postal Service who is responsible for managing a local branch of the post office. The abbreviation for postmaster is PM.

• John is the postmaster of the local post office in our town.
• The postmaster is responsible for ensuring that mail is delivered on time and that the post office runs smoothly.

These examples illustrate how a postmaster is responsible for managing a local branch of the post office. They are in charge of ensuring that mail is delivered on time, that the post office is well-staffed, and that customers are satisfied with the service they receive. The postmaster is an important figure in the community, as they are responsible for ensuring that mail is delivered to everyone in the area.