What is the purpose of a USB cable?

The primary purpose of a USB cable is to connect peripheral devices to a computer. This connection allows for communication between the computer and the devices, enabling data transfer and device management. USB cables are widely used for a variety of peripherals, including keyboards, mice, printers, and external storage devices. They provide a standardized way to connect and interact with numerous types of hardware, facilitating both data transmission and, in many cases, power delivery.

While it is true that USB cables can also be used to power devices and charge batteries, these functionalities are secondary to their main role in establishing a direct connection between a computer and its peripherals. USB technology has evolved over the years, supporting various versions that improve speed and compatibility, thus enhancing the overall functionality of devices when connected to a computer.