WhatsApp Session messages are any messages sent and received within a window of 24 hours. WhatsApp sessions are measured in fixed 24-hour sessions. A WhatsApp session starts when the first business message (template) in a conversation is delivered, either initiated by the business or in reply to a user message. Each 24-hour WhatsApp session results in a single charge. Businesses and users can exchange any number of messages within a 24-hour conversation session without incurring additional charges. WhatsApp conversations fall into two categories that are priced differently:
