The Android USB Ethernet RNDIS Gadget is a driver that allows your Windows computer to connect to an Android device via USB and use the device's mobile data connection as an Ethernet network adapter. This is commonly used for USB tethering where your Android phone acts as a modem to provide internet access to your computer through a USB cable.

RNDIS (Remote Network Driver Interface Specification) is a Microsoft USB network protocol that enables devices like smartphones or tablets to emulate an Ethernet device over USB, allowing data transfer between the Android device and the PC.