This can be any name you wish. People typically choose their guild's name. It must be at least 4 characters in length.
This is the password you will give out to the people you want to allow to connect to your server.
This is the password that you will use to create channels, ban/kick users, and setup special permissions for users. This password should NOT be shared with anyone. It must be different from the Join Password.
You password must contain an uppercase letter, a lowercase letter, a number, and be at least 6 characters in length.