HDMI connectors are a type of interface 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. There are several types of HDMI connectors, including Type A for standard devices, Type C for portable devices, and Type D for mobile devices. Each type is designed to fit specific ports, ensuring compatibility across various electronics.