A WPS PIN (Wi-Fi Protected Setup Personal Identification Number) is a security feature used to connect devices to a wireless network easily. It consists of an eight-digit code that is generated by the router and can be found on the device's interface. Users enter this PIN on their Wi-Fi enabled devices to establish a secure connection without needing to input the network password. This method simplifies the process of connecting devices like smartphones, tablets, and printers to a Wi-Fi network. By using a WPS PIN, users can enhance security while avoiding the hassle of remembering complex passwords.