This feature has been available for beta testers for quite a while but just rolled out to normal WhatsApp users. WhatsApp just became a safer chat platform with the roll out of the two-factor authentication to 1 billion users.
2FA is an enhanced security measure that adds a second layer to the log-in process, making it more difficult for intruders to access your account.
It’s advisable for everyone to TURN-ON 2 factor authentication but it’s an optional features for everyone
How to TURN-ON 2Factor Authentication on WhatsApp?
>>First of all, make sure your WhatsApp is up to date or you are running the latest version of WhatsApp
>> Go to account settings in WhatsApp, you'll see a new Two-step verification option. Tap it to get to a screen that explains what 2-step verification is and get the option to enable it.
>> Enter a 6-digit passcode that you'll be asked for each time you try to register your phone number with WhatsApp, and confirm it.
>> You'll also need to give an email address that will be used to reset your passcode should in case you forget it.
Once that's done, two-step verification will be active on your phone number. No one will be able to activate WhatsApp with the same phone number unless they have the passcode or access to the email account to reset it.