The CH340G is a manufactured by WCH (Jiangsu Qinheng Co., Ltd.). It is widely used in "clone" or budget-friendly Arduino boards (like the Uno R3 and Nano) because it is significantly cheaper than the FTDI or ATmega16U2 chips found on more expensive modules. Why Do You Need the Driver?
The CH340G acts as a bridge between a computer's USB port and a microcontroller's serial pins (TX, RX). ch340g driver