The WhatsApp Business API is a service that allows businesses to communicate with customers on WhatsApp at scale. It provides a suite of tools and features that businesses can use to automate and streamline their customer service, marketing, and sales operations. To get started with the WhatsApp Business API, businesses need to create a WhatsApp Business account and then partner with a WhatsApp Business Solution Provider (BSP). BSPs are companies that have been authorized by WhatsApp to help businesses integrate with the WhatsApp Business API.