HDMI cables are essential connectors used to transmit high-definition video and audio from one device to another. They are commonly used to connect devices like televisions, computers, and gaming consoles to monitors or projectors. The cables support various resolutions, including 4K and 8K, making them ideal for modern entertainment systems. These cables come in different types, such as Standard HDMI, Mini HDMI, and Micro HDMI, catering to various devices and needs. Additionally, HDMI cables can carry digital audio signals, eliminating the need for separate audio cables. This versatility makes them a popular choice for home and professional setups.