2FA stands for Two-Factor Authentication. It adds an additional layer of security to your account by requiring a second form of authentication, usually a code generated by an app, in addition to your username and password. We use Google Authenticator as 2FA. To activate 2FA on your Algoine account, first, you will need to download Google Authenticator to your mobile phone. Then from your Algoine dashboard, click on your nickname at upper left, go to 'Edit Account', click on 'Edit' in Two-Factor Authentication section and follow the instructions to enable 2FA using the app to scan the QR code.