Modern-day homes consist of a wide array of gadgets and devices. When you restart a device, you clear the built-up cache and eliminate idle processes, both of which can have a major impact on the device's performance. The biggest benefit of restarting devices periodically is that it helps prevent common problems from showing up. Keep in mind that restarting and resetting a device are entirely different concepts, and we are specifically discussing the former. A restart entails power cycling the device, which is basically cutting off power for a short period.