What is PNR on a flight ticket? What does it do?

The PNR code is an abbreviation of the Passenger Name Register. We can also say "reservation number". When you buy tickets, they are sent to you by SMS and e-mail. It consists of numbers and letters. With this number, you can print out your ticket at airports, make changes and cancellations. In short, it is the easiest way to access your flight information.