This article explains how to enable and disable two-factor authentication on the Facebook website.

Facebook accounts often contain a lot of personal information and other private data, so it's important to know how to enable two-factor authentication (2FA) on Facebook. With 2FA enabled, you'll be asked to validate your identity every time you log in. Validation uses methods that include entering a one-time code sent to your mobile device or approving the authentication attempt on another trusted device.

Go to your Facebook homepage and click the down arrow in the top right corner.

In the menu, click Settings & Privacy > Settings.