A USB cable is a type of cable used to connect electronic devices for data transfer and charging. It typically has a rectangular connector on one end, known as USB Type-A, and a smaller connector on the other end, such as USB Type-B or USB Type-C. These cables are commonly used with devices like smartphones, tablets, and computers. USB cables come in various lengths and types, allowing for different functionalities. They can transfer data at varying speeds, depending on the version, such as USB 2.0 or USB 3.0. Additionally, they can provide power to devices, making them essential for everyday technology use.