How to change wifi password

If you need help with your Wi‑Fi password' click here --> https://support.apple.com/HT204070 - "Learn how to tell that a Wi-Fi network requires a password, and what to do if you don’t know or don't remember the password."

This usually involves entering a numerical address for the router in a web browser and logging into the router itself. Check with a manual provided with your router for how to do this.