What is the "Two-Factor Authentication?"

[snarked]

Title says it all.

[kcochran]

If someone wants to add additional authentication requirements to their account, they can enable this functionality.  It currently supports TOPT-based applications for the secondary check, such as Google Authenticator, Authy, or similar.  Do note, adding 2FA does mean normal account/password recovery options become unavailable if you do not have that secondary authentication available.

[snarked]

Thanks.  Thought it was something like this.  Almost sounds like trouble if one forgets a PW.

[kcochran]

Actually, let me clarify on that.  As it stands currently, you can trigger a password reset w/o the second-factor.  Granted, that doesn't net anything if you don't have the second-factor, since you still wouldn't be able to get into the account.  The big trouble is if you lose the second-factor.

[VA6DAH]

I can't enable it, the "enable" button does nothing for me.

Help?