Power plugs are devices used to connect electrical appliances to a power source. They typically consist of two or three metal prongs that fit into a corresponding socket, allowing electricity to flow from the outlet to the appliance. Different countries have various plug designs and voltage standards, which is why travelers often need adapters. The design of power plugs can vary significantly, with some featuring additional safety features like fuses or grounding prongs. Common types include Type A, Type B, and Type C, each suited for specific regions. Understanding these differences is essential for safe and effective use of electrical devices.