What is a p endorsement on a driver license?

A "P" endorsement on a driver's license signifies that the holder is authorized to operate a vehicle designed to transport passengers, typically for hire, such as a bus or taxi. This endorsement is often required for commercial drivers who transport more than a specified number of passengers. To obtain a "P" endorsement, drivers usually need to pass additional tests, including a written exam and a driving skills test specific to passenger vehicles.