The WhatsApp Business API is a solution designed for medium and large businesses to communicate with customers at scale. Unlike the free WhatsApp Business App aimed at small businesses, the API allows integration with backend systems, CRMs, and other tools to send automated messages, manage conversations, and offer support in a structured and scalable manner.

The API provides a non-graphical interface that allows businesses to automate workflows, customize notifications, and maintain real-time interactions with customers. However, it's essential to note that WhatsApp Business API does not come with its own UI. Instead, it integrates with third-party platforms, allowing for a highly customizable solution for businesses that need to automate their communications.