PCBs, or Printed Circuit Boards, in the Electronics category are crucial components used to mechanically support and electrically connect electronic components using conductive pathways, tracks, or signal traces etched from copper sheets laminated onto a non-conductive substrate. They are fundamental in virtually all electronic devices, providing a compact and reliable platform for complex circuits while simplifying assembly and repair processes. PCBs are essential for the functionality and organization of electronic components in a wide range of applications, from small gadgets like watches to large-scale computer systems, ensuring efficient and stable electrical connections.