USB stands for Universal Serial Bus, and its primary function is to facilitate data transfer and provide electrical power between devices. Introduced in the 1990s, USB has become the standard interface for connecting various peripherals such as keyboards, mice, external drives, and smartphones to computers. It simplifies the process of connecting multiple devices while enhancing data transfer speeds and power delivery. USB technology has evolved through various versions, improving performance metrics and expanding functionality, including the introduction of USB-C, which offers versatility and improved data handling.