> For the complete documentation index, see [llms.txt](https://support.tilt.app/tilt-help-desk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.tilt.app/tilt-help-desk/general/what-is-two-factor-authentication-and-how-does-it-work.md).

# What is two-factor authentication and how does it work?

Two-factor authentication (2FA) is an optional security feature that helps keep your account secure.

It’s even safer than just using a password and helps ensure you are the only one who can access your account.

When two-factor authentication is turned on and you log in on a new device, we’ll text you a 6-digit login code that you’ll need to enter to log in.