Netlify has officially released two-factor authentication as an opt-in feature to enhance the security of user accounts, providing an additional layer of protection against unauthorized access. Two-factor authentication requires users to provide a second piece of information, such as a code sent to their phone or a fingerprint scan, in addition to their username and password, making it more difficult for hackers to gain access to accounts. Users can enable two-factor authentication through the User Settings page on Netlify, with options including using popular authentication apps like Authy or Google Authenticator. Once enabled, users will need to save recovery codes in case they lose access to their two-factor authentication apps, providing an added layer of security to protect their account.