PCB board is used for all electrical appliances in life
You'll find PCBs literally for most from the electronic things we have seen and use every single day. They are largely accountable for the fact that lots of the devices we use daily are smaller yet have an overabundance of technology within them.
Televisions and Radios
Video game consoles
Home security systems
You'll also find them in your car or motorcycle or on the bike if you have lights. Should you be off away sooner, you will also find them on the place in the plane! Other uses include military, medical and industrial components. That's why they are utilized everywhere and you also encounter devices which use them in everything you do.