Printed circuit boards can be found on almost all electronic devices, so what is the purpose of printed circuit boards?

The general purpose of a printed circuit board is to connect all the components that a electronic device may need. Provides a fixed position and mechanical support for the assembly of transistors, integrated circuits, resistors, capacitors, inductors and other components; realizes wiring and electrical connections between transistors, integrated circuits, resistors, capacitors, inductors and other components. The printed circuit board provides channels and paths for current and signals. Provide operation and work for electronic equipment. Without the PCB, the electronic device may not even start. PCB has more than simple functions. It can also add specific components and customize the design. For example, the PCB in a computer is known to most people as the motherboard. PCB can also be used in the fields of medical pcba and gps tracker pcb.