In order to get unlimited access to Whatsapp Business, Whatsapp requests you to verify your Facebook Business account. This can be done by logging into business.facebook.com and follow the process below:
- Navigate to the Security Center in Facebook Business.
- Click on "Start verification" under the "Business verification header:
- Go through the process and fill out the requested information.
- Await approval, this can be done immediately or take up several days.
Be aware that the Business verification process is entirely controlled by Facebook.
Once your Facebook Business profile has been successfully verified, your application will go to WhatsApp for approval.