A "Single-Pole" refers to a type of electrical switch that controls a single circuit. It has two terminals and is commonly used to turn lights or devices on and off from one location. When the switch is in the "on" position, it allows electricity to flow, powering the connected device. In residential wiring, a single-pole switch is often found in homes, making it a standard choice for light fixtures. It is straightforward to install and operate, making it ideal for simple lighting control without the need for additional switches or complex wiring systems.