What does PCB stand for?

What is a PCB? Why do people call it that? Do I need one?

It is an circuit. which is printed on dielectric material board used for the external commercial application. so it is simply called as PCB widely. which stands for Printed Circuit Board.

This problem has been bothering me. Later, I found a lot of information to know that this is the general name for printed circuit boards, which can also be called breadboard.