An HDMI switcher is a device that allows multiple HDMI sources, like a Blu-ray player, gaming console, or streaming device, to connect to a single HDMI input on a TV or monitor. This is useful when you have limited HDMI ports on your display and want to easily switch between different devices without constantly plugging and unplugging cables. Using an HDMI switcher is straightforward; you simply connect your devices to the switcher and then connect the switcher to your display. Most switchers come with a remote control or a button to select which device you want to view, making it convenient to manage multiple sources.