Domestic electrical outlets supply mains power for electrical appliances. “Alfan Grounded Outlets” have grounding pins in addition to the hot and neutral. The grounding pins are important for devices with a metallic casing or metal-cased power supply, like computers. The grounding wire is directly connected to the casing of the device and will neutralize the risk of shock by diverting current to the ground, which will trip the circuit breaker, and stop the current flow to the device.
Note: this type of outlet is not smart.