A password is a secret combination of letters, numbers, and symbols used to authenticate a user’s identity. It helps protect access to accounts, devices, and sensitive information. Passwords are essential for online security, ensuring that only authorized individuals can access personal data. To create a strong password, it is recommended to use a mix of uppercase and lowercase letters, numbers, and special characters. Avoid using easily guessable information, such as birthdays or common words. Regularly updating passwords and using unique passwords for different accounts can further enhance security against unauthorized access and cyber threats.