What is the purpose of a boarding pass?

The purpose of a boarding pass is to serve as proof of a passenger's reservation and to allow access to the plane. It is an essential document that indicates the passenger's entitlement to board a specific flight at a designated time. The boarding pass contains important details such as the flight number, gate information, boarding time, and seat assignment. It acts as a checkpoint for airline personnel to confirm that the passenger has completed the check-in process and is authorized to board the aircraft. This function is crucial for ensuring the proper management of passenger flow and maintaining security at the boarding gates.