PCB soldering is another term for the process of soldering electrical circuit boards.This type of soldering is one of the most basic techniques that anyone wishing to work with electronics and electrical circuits must learn. While there are many different ways you can complete the soldering process, the most basic explanation of the soldering process is that it’s a way of joining two small pieces together on the surface of the PCB, which stands for Printed Circuit Board. In other words, soldering is a way of connecting two or more different electrical components on your circuit board.