Showcase product catalog in message template
You can present your product catalog to your customers entirely within WhatsApp.
Catalog templates display a product thumbnail header image of your choice and custom body text. The text header, sub-header, and button text are non-editable.

When a customer taps the View catalog button in a catalog template message, your product catalog appears within WhatsApp.

Add catalog to message template
When creating your template in Facebook Business Manager, select Marketing -> Product messages as the category.

Follow the steps to complete all required information and submit for approval.