The new two-step verification is optional, but ideally, you should secure your WhatsApp account. The company assures that once two-step verification enabled, any attempt to verify phone number on WhatsApp will require a six-digit passcode that is created by the user.
How to Enable Two-Step Verification on WhatsApp
To enable WhatsApp’s two-factor authentication, you need to follow these steps
Open WhatsApp app.
Go to Settings.
Go to Account.
Look for Two-step verification.
Tap on Enable.
On the next screen, enter six-digit passcode..
Next, re-enter six-digit passcode.
Optionally, add your email address on the next screen.