https://www.wpwhitesecurity.com/wordpress-plugins/best-two-factor-authentication-plugins-wordpress/
Two-Factor Authentication, (aka Two-Step Verification, 2FA) is an additional layer of security you can add to your WordPress login page. With 2FA it is virtually impossible for attackers to login to your WordPress, even if they guess your user’s password. Two-factor authentication is also good to help mitigate WordPress brute force attacks.
Read our article An Introduction to Two-Factor Authentication
Source: Security Feed