2fa security is a app? @Smpdytz1 ..thank you
No. 2FA means two-factor authentication, which basically means that you need your password plus some other thing to access your account. There are different ways to achieve this; some services send codes to your mobile number and some require the use of apps such as Google Authenticator.
I would definitely recommend everyone use this feature if available, especially for crypto-related stuff.
Also, in general, a desktop wallet even without 2FA is safer than an online wallet with 2FA. Just something to keep in mind.