Strong password can be created by mix up with numbers, lowercase letters, capital letters and special characters. Choose longer password and it is the better and not easy to decrypt. You are requested to never use the same password twice. If you are using the same password across the board and if a hacker does track down your password then they can easily have access to all of your accounts. Never use passwords like your kids name, birthday, anniversary, "1234567", or the ever popular, "password" it will be easily to hack your password.