A toggle switch is a type of electrical switch that allows users to turn a device on or off. It typically has a lever or a button that can be flipped or pressed to change its position. When the switch is in one position, it completes the circuit, allowing electricity to flow, while the other position breaks the circuit, stopping the flow of electricity. Toggle switches are commonly used in various applications, including household appliances, lighting systems, and machinery. They come in different sizes and styles, such as single-pole or double-pole, to accommodate different electrical needs and configurations.