The **WhatsApp API** allows businesses to integrate WhatsApp messaging into their applications, enabling automated messaging, customer support, and notifications. It includes the **WhatsApp Business API**, designed for medium and large businesses, and the **Cloud API**, hosted by Meta for easier scalability. Features include **end-to-end encryption, interactive messages, templates, media sharing, and chatbot integration**. Access requires approval from Meta and adherence to WhatsApp\'s policies.