Facebook Business ID
Activating a WhatsApp number with a Facebook Business ID allows you to set up your default display name so that your customers can have clue that the message came from you. WhatsApp display name is similar to a Sender ID in the case of SMS and Verification.
To access your business ID, navigate to Facebook Business Dashboard. If you don't have a business account, create one.
Facebook allows businesses to create multiple business accounts.
The above account has only one business account. Click on settings and access the account information, there you will find your Facebook Business Manager ID.
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