Duet Web Control (also known as DWC) is the user interface used over a network connection in a browser to configure and control a Duet. The manual for the use of the DWC is here: Duet Web Control v2 and v3 (DWC) Manual

Open your browser and type the IP address assigned to the Duet in step 5

Now that we have connected to WiFi and DWC we can update the firmware