An electrical receptacle, commonly known as an outlet, is a device installed in walls that allows electrical appliances to connect to the power supply. It typically has two or three slots for plugs, enabling the flow of electricity to devices like lamps, computers, and kitchen appliances. Receptacles come in various types, including standard, GFCI (Ground Fault Circuit Interrupter), and USB outlets. Each type serves a specific purpose, such as providing extra safety in wet areas or allowing direct charging of devices without an adapter. Proper installation and maintenance are essential for safety and functionality.