High-Definition Multimedia Interface (HDMI) is a standard for transmitting high-quality audio and video signals between devices. It is commonly used to connect devices like televisions, computers, and gaming consoles to monitors and projectors. HDMI supports various resolutions, including 4K and 8K, making it suitable for modern high-definition displays. HDMI cables carry both audio and video signals through a single cable, simplifying connections and reducing clutter. The interface also supports features like 3D video, Ethernet, and ARC (Audio Return Channel), enhancing the overall multimedia experience. HDMI has become the standard for home entertainment systems and professional setups.