When you receive an inbound message from webhooks, you can use this endpoint to mark the message as read and display a typing indicator so the WhatsApp user knows you are preparing a response. Messages marked as read display two blue check marks alongside their timestamp.The typing indicator will be dismissed once you respond, or after 25 seconds, whichever comes first. To prevent a poor user experience, only display a typing indicator if you are going to respond.

Marking a message as read will also mark earlier messages in the conversation as read.