The short form of Wi-Fi protected setup pin is commonly known as the WPS pin. This is an encrypted code or personal identification number which helps connect your device to the Wi-Fi set up. This can be found on the backside of your router or from the printer Control Panel also. To connect your HP printer to the router, you can use the “settings” option on your printers Control Panel and then click on the “Wi-Fi protected setup” and then follow the on-screen instructions and finally enter the WPS pin to connect the printer to a network.https://www.hpprintersupportpro.com/blog/find-the-wps-pin-on-my-hp-printer/