A: A Multilayer PCB Assembly is a circuit board comprising multiple layers of conductive traces, insulating material, and other components. These layers are stacked together and interconnected through vias, which are small plated holes that allow electrical connections between the different layers. Multilayer PCBs are commonly used in electronic devices where space is limited or complex circuitry is required, enabling better performance and more efficient signal routing than single or double-layer PCBs.