After successful authorization on the exchange - click on the icon of your profile and select “Profile".
 

Activate the “Two-factor authorization" slider.
 

Download the app to your phone using the Google play or App Store links. Click “Continue".
 

Click the “+” button of the downloaded Google Authenticator app and select "Scan Barcode".
Scan the suggested QR code or enter the code manually.
Click “Continue”
 

Enter the code from the Google Authenticator application in the suggested field and click “Send”
 

Upon successful activation, you will see the activated slider “Two-factor authorization.
Then, for the safety of using the exchange, activate the “Use 2fa to confirm the withdrawal” slider