Hello @Rajiya ,

Welcome to our community.

The Wi-Fi password, also known as the security key, is required to connect your device to your TP-Link router's wireless network. If you are connecting for the first time, please check the label on the bottom or back of your TP-Link router. The default Wi-Fi password (sometimes called 'Wireless Password', 'Wi-Fi Key', or 'PIN') is usually printed there and is often an 8-digit number.

If you have changed the Wi-Fi password and cannot remember it, you will need to reset your router to factory settings. To do this, press and hold the reset button on your router for about 5–10 seconds. After resetting, use the default password on the label to reconnect.

Note: The security key and Wi-Fi password are the same thing. If you need further help, please let us know the exact model or any additional details.