The WhatsApp Business API is a platform that allows businesses to integrate WhatsApp into their communication strategies. It enables enterprises to send messages, notifications, and conduct customer interactions on the WhatsApp platform.

To use the WhatsApp Business API, businesses need approval from WhatsApp. The application process involves meeting specific criteria, and access is typically granted to medium and large businesses to maintain a high-quality user experience.

The API supports different messaging types, including Session Messages for real-time conversations, Template Messages for predefined content like notifications and alerts, and HSM (Highly Structured Messages) for rich, interactive messages.

The API provides features such as media sharing (images, documents), group messaging, message templates for consistent communication, and message tracking to monitor delivery and engagement. It allows businesses to create interactive and personalized experiences for users.

Security is a priority for WhatsApp API. End-to-end encryption is maintained for user privacy. Businesses must adhere to WhatsApp's policies and data protection regulations, ensuring secure handling of user information to build and maintain trust with users.