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Learn how the message window functions and sending messages
If you and the customer had no conversation in the last 24 hours, you are required to send a pre-approved WhatsApp template message to reopen the messaging window. When you receive a reply from your customer, you can keep sending free-form session messages to the customers within the next 24 hours.
It begins when messages are sent to reply to customers' incoming messages. This means that the customer is the one who sent your business an incoming message first. For this type of conversation, you can send free-form messages instead of just template messages.