A plug is a device with metal prongs that connects to an electrical outlet, allowing electrical current to flow from a power source to an appliance. The prongs fit into a socket, which is a fixed electrical receptacle mounted on walls or surfaces. Together, they enable the safe transfer of electricity to power devices like lamps, computers, and kitchen appliances. Sockets come in various designs and configurations, depending on the country and electrical standards. They are designed to securely hold the plug in place, preventing accidental disconnection. Proper use of plugs and sockets is essential for safety, as improper connections can lead to electrical hazards.