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USB, or Universal Serial Bus, is a standard connection interface for linking computers with peripheral devices like mice, keyboards, and printers. It allows for high-speed data transfer, provides power to connected devices, and is "hot-swappable," meaning devices can be plugged in or unplugged without shutting down the computer.

Key functions of USB

Data transfer: Enables fast data transfer between a computer and devices like flash drives, external hard drives, and cameras.

Power supply: Can provide power to low-power devices, eliminating the need for a separate power cord for accessories like USB fans, lights, and external hard drives.

Plug and Play: Allows a device to be connected and automatically recognized by the computer, often requiring a simple driver installation for full functionality.

Hot-swapping: Lets users plug in or remove devices while the computer is on.