Card edge connectors, also known as edgeboard connectors, are used for connecting PCBs to external circuits. These connectors are essential in computers, gaming consoles, and other electronic systems requiring rapid and flexible connections. Designed for ease of use and durability, they ensure stable and high-speed signal transmission. Top manufacturers like 3M, Amphenol, and TE Connectivity provide a wide selection of card edge connectors to cater to diverse applications.