A business can send messages outside of an active customer service window by using a template message. Template messages can only be sent using a predefined message template. WhatsApp template messages belong to one of three categories, each with a corresponding template type and pricing structure: utility, authentication, or marketing.
Sinch registers these message templates with WhatsApp for approval. Once the message template has been approved by WhatsApp, the client can dispatch them using the API.
Each message template can include personalization variables, which are defined in the onboarding worksheet.
More information on WhatsApp template messages and the Conversation API
