A USB-C to HDMI converter is a small device that allows you to connect your USB-C enabled device, such as a laptop or smartphone, to a HDMI enabled display, such as a monitor or TV. This allows you to mirror or extend your screen onto a larger display for better viewing or presentations. The USB-C to HDMI converter typically supports up to 4K resolution for high quality video output. It is a convenient and versatile tool for connecting your devices to different displays.