A password is a secret word or phrase that helps protect your personal information online. It acts like a key, allowing only you to access your accounts, such as email or social media. A strong password usually combines letters, numbers, and symbols, making it harder for others to guess. Using unique passwords for different accounts is important to enhance your security. If one password is compromised, it won't put all your other accounts at risk. Tools like password managers can help you create and store complex passwords, making it easier to keep your information safe.