Do you have several machines under your television, or do you use the same monitor to play PC and console games? With a audio and screen switch, you can easily switch between your different devices without having to change the cables in the machine. For example, if you want to use a DVD player, an Apple TV, a Raspberry Pi, a Chromecast and a Playstation for the same TV, but if you need HDMI inputs, you can use a screen and audio switch.
It is not just on your flat screen, you can benefit from an audio and screen switch. If you have a computer screen with an HDMI, DVI or VGA input, you can expand the number of inputs with a switch. Some models have a button on the switch, while others use a remote control to control the box. An audio and screen switch is cheap, which makes it easy to get started.