HDMI ports are connectors used to transmit high-definition video and audio from one device to another. Commonly found on devices like televisions, computers, and gaming consoles, they allow for a single cable connection, simplifying setup and reducing clutter. These ports support various resolutions, including 4K and 8K, and can carry multi-channel audio, making them ideal for home entertainment systems. Different versions of HDMI, such as HDMI 2.0 and HDMI 2.1, offer varying features and capabilities, ensuring compatibility with a wide range of devices.