HDMI stands for High-Definition Multimedia Interface, and it is a digital audio/video interface that is used to connect electronic devices. HDMI cables are commonly used to connect TVs, computers, Blu-ray players, and other devices. One of the main benefits of using an HDMI cable is that it provides a single cable connection that can carry both audio and video signals. This means that you only need one cable to connect your TV and your computer, for example. HDMI cables also support higher resolutions than other types of cables, so they are ideal for use with HDTVs. If you have any devices that use an HDMI connection, chances are you will need an HDMI cable to connect them.