It is important to change your default WiFi name and password for security reasons.
In order to update your password here is what you need to do:
Enter the address into your browser's address bar : Standard router addresses are 192.168.1.1, 192.168.0.1, 192.168.2.1, or 10.0.1.1 (Apple) or 10.0.0.1 (Xfinity).
Enter your router's username and password.
Open the Wireless section. Once you are logged into your router, you will need to find the Wireless section of the configuration page. The exact name changes from manufacturer to manufacturer, but generally you are looking for a ""Wireless"" or ""Wireless Settings/Setup"" tab or button.
Change the password. Look for the box labeled ""Password"", ""Passphrase"" or ""Shared Key"". You can enter your new password into this box.