Motherboards are the main printed circuit boards (PCBs) in computers, serving as the backbone that connects all components. They house the CPU, RAM, and other essential parts, allowing them to communicate with each other. A motherboard's design and features can significantly impact a computer's performance and capabilities. Different types of motherboards cater to various needs, such as gaming, workstations, and servers. Each type offers unique features like enhanced cooling, overclocking support, and multiple expansion slots. Choosing the right motherboard is crucial for building a system that meets specific requirements and performance goals.