What is WPS?
Wi-Fi Protected Setup (WPS; originally, Wi-Fi Simple Config) is a network security standard to create a secure wireless home network.Designed to allow home users to use the wireless network to simplify the encryption step.
If your router also supports WPS function, then you only need to press the module and the router's WPS button, you can configure the module to the router. Of course, this configuration has a success rate, not every success.
If you want to know more, please refer to Wikipedia：https://en.wikipedia.org/wiki/Wi-Fi_Protected_Setup