A push button switch is a simple electrical component used to control the flow of electricity in a circuit. When pressed, it completes the circuit, allowing current to flow and powering devices like lights or machines. When released, the circuit opens, stopping the flow of electricity. These switches come in various designs, including momentary and latching types. A momentary switch only stays on while being pressed, while a latching switch remains on until pressed again. Common applications include home appliances, computers, and industrial equipment, making them essential in everyday technology.