You can find information about the WhatsApp Business API in different places:
Best for: Businesses working with Solution Partners, or non-technical stakeholders using the WhatsApp Business API
Learn how to use the WhatsApp Manager and the Facebook Business Manager, as they related to the WhatsApp Business API:
Best for: Developers setting up and maintaining the WhatsApp Business API integration
Learn how to implement WhatsApp Business API and its set of supporting products:
Best for: All WhatsApp users
Learn how WhatsApp users communicate with businesses every day on WhatsApp: