The first step to learn how to hack anyone's wifi password according to https://celltrackingapps.com/how-to-hack-wifi-passwords/ is to identify and filter its communication. This is done with a special command called beacon. This command filters wifi password communication using the correct hash of the original wifi network. Once you have this information, you can export these packets and use one of many software tools to crack any wifi password. Some of these tools include aircrack-ng, rainbow crack, hashcat, and omphcrack.