How to find others WiFi password

Question

I'm interested in understanding network security and how WiFi credentials are protected. I’ve come across discussions about retrieving saved WiFi credentials, but I’d like to know more about the security mechanisms in place that prevent unauthorized access to other users’ networks. How does encryption (like WPA2 or WPA3) work in these scenarios, and what ethical hacking practices are relevant to protect WiFi access?

If someone could explain secure methods for protecting WiFi networks from unauthorized access, it would be helpful.