Two-factor authentication is a method for protection your web account. When it is activated you need to enter not only your password, but also a special code. You can receive this code by in mobile app. Even if third person will find your password, then cant access with that code.

Enabled

• Install an authentication app on your device. Any app that supports the Time-based One-Time Password (TOTP) protocol should work.
• Use the authenticator app to scan the barcode below.
• Enter the code generated by the authenticator app.
• When disabling 2fa, to be sure you are doing this, you have to scan the barcode still

Disable 2fa