A plug-in timer is a device that allows you to control the flow of electricity to an electrical outlet. This can be useful for a variety of purposes, such as turning lights on and off at specific times, or controlling the operation of appliances.
Plug-in timers are relatively inexpensive and easy to use. They are typically small and lightweight, and they can be plugged into any standard electrical outlet. Once plugged in, the timer can be programmed to turn the outlet on and off at specific times. Some timers also allow you to set multiple on/off cycles per day.