The HDMI Audio Return Channel (ARC) is a feature of the HDMI interface that allows audio to be sent from a TV back to an audio device, such as a soundbar or AV receiver. This eliminates the need for a separate audio cable, simplifying the connection between devices. With ARC, users can enjoy high-quality sound from their TV's built-in apps or broadcast channels through their external audio system. It also enables control of multiple devices using a single remote, enhancing the overall user experience and reducing cable clutter in home entertainment setups.