What is a USB Virtual Serial Port Driver?
A USB Virtual Serial Port driver allows a USB device to emulate a traditional serial port (RS-232) connection on a Windows computer. This is commonly used for devices such as modems, GPS devices, industrial equipment, or custom hardware that needs to communicate over a serial interface but uses a USB connection instead.
When you plug a USB device that requires serial communication into a Windows PC, the operating system might assign it a virtual COM port (a COM port number). The driver is what allows Windows to treat the USB device as if it's a traditional serial device.