A password manager is a site or app which stores your passwords in one place. You will need to log in to your password manager before using it. But this is the only password you’ll need to remember. We would also strongly recommend enabling multi-factor authentication (MFA) too.
When logged in to a password manager on a web browser, you can add extensions to autofill your login credentials on sites. You can also store other login credentials. Password managers can also create random, unique passwords for you.