Two-factor authentication (2FA) is a way to add additional security to your account. For Magento 2 stores, the admin panel is where all the important store, orders and customers data can be accessed. Securing it is utmost important with method to install Magento 2 two factor authentication.
You can do so with the help of the tutorial at https://meetanshi.com/blog/install-magento-2-two-factor-authentication/