End-to-end AES-256 bit encryption, salted hashing, and PBKDF2 SHA-256.

There are plugins for Firefox, Chrome, Safari, Opera, Edge, Vivaldi and Tor Browser.

Bitwarden is open source and can therefore easily be reviewed and checked for security.

Offers 2FA with Authy, Google Authenticator or via email.
Additionally, the Pro Version has Duo Security with Duo Push, SMS, phone call, and U2F security keys: YubiKey (any 4 series device or YubiKey NEO) and FIDO U2F (any FIDO U2F certified key).

Possibility to manage passwords without installing the app or the browser plugin.

You can store multiple logins on the same website.

When a site has multiple credentials (like I have for some brokers and banks), then the most recently used is automatically populated (if auto-fill is opted). This feature is unique (to my knowledge) and spectacular (especially for sites that log you off frequently and re-logging in is required).

No need to think of individual passwords. This can be easily accomplished with an easy to use built-in password manager.

Automatically synchronises across various devices and platforms. Passwords get fully encrypted locally before leaving the computer.

It is easy to start as the majority of features are on the free version.