What is a three-way switch and how does it function in a typical electrical circuit?

A three-way switch is a type of electrical switch that is used to control a light or other electrical device from two different locations. It has three terminals and allows the circuit to be turned on or off from either switch. In a typical electrical circuit, the three-way switch works by allowing the flow of electricity to be redirected between the two switches, depending on their positions, to control the connected device.