USB stands for Universal Serial Bus. It is a standard protocol used for connecting various devices to a computer. USB provides a simple and easy way to transfer data between devices such as flash drives, keyboards, mice, printers and smartphones. USB is a widely adopted technology due to its ease of use, portability and versatility. It allows devices to be connected and disconnected without having to restart the computer or install additional hardware. USB also provides power to devices that require it, making it an essential technology for modern computing.