In one sentence: A passkey is a way to sign in with your fingerprint, face or phone screen lock, instead of a password.
Why it matters: A passkey is tied to the real website, so it is built to resist fake sites. There is no password to remember, type or give away. A passkey has limits. Anyone who can unlock your device may be able to use it, so keep your screen lock on.
One thing to do: Open your main email account settings and look for a passkey option. Create one only on a device you own.
Related terms: biometrics, security key, password manager
Learn more: The 30-Minute Account Clean-Up; Passkeys Explained: Signing In Without a Password
Checked: 25 Oct 2026. Settings screens change. If yours looks different, search the company's help page.
