LastPass is a password management tool that helps users securely store and manage their passwords. It allows individuals to create strong, unique passwords for different accounts without needing to remember each one. Users can access their passwords through a master password, which is the only one they need to remember. In addition to password storage, LastPass offers features like password generation, secure notes, and two-factor authentication for added security. It is available as a browser extension and mobile app, making it convenient for users to access their passwords across various devices.