for mfa. and yes, that's how i see it and use it
Discussion
...and passkeys
"YubiKey is designed to meet you where you are on your authentication journey by supporting a broad range of authentication protocols, including FIDO U2F, WebAuthn/FIDO2 (passkeys), OTP/TOTP, OpenPGP and Smart Card/PIV."
*typo: ignore the first line*
So just the authenticator for 2FA or does it actually store passwords as well?
it is a mfa hardware authenticator key. it does not store passwords, except for when using the yubikey in secure static password mode where it is recommended the user store only half of a password i.e. the user types the first half, then uses the yubikey to complete the other half.
check out the website for more info 🤙🏻