1. Reply/Session Message
Your business can send any nature of messages. There is no limit defined by WhatsApp. Although if you send too many messages (may be promotional in nature), then the user itself can block you. If your business gets too many blocks then WhatsApp can deactivate your account. Currently, WhatsApp hasn't shared any more details on this but if your use-case is right then there is nothing to worry. Among all the brands using us, no one has to face this issue.
2. Notification/Post-Session Message
You can only send non-promotional content as notification messages. Only fixed pre-approved templates can be sent to the user. WhatsApp manually approves these templates to make sure you only send non-promotional content. There are 10 supported categories for Notification Templates:
| Title | Description | Examples |
|---|---|---|
| Account Update | Notify the user about updates or changes to their accounts. | The profile has changed, Preferences are updated, Settings have changed, Membership has expired, Password has changed |
| Payment Update | Send a message to a user of a payment update for an existing transaction. | Send a receipt, Send an out-stock notification, Notify an auction ended, Status on a payment transaction has changed |
| Personal Finance update | Confirm a user's personal financial activity. | Funds transfer confirmation or update, Other transactional activities in financial services |
| Shipping Update | Notify the user of a change in shipping status for a purchased product | Product is shipped, Status charges to in-transit, Product is delivered, Shipment is delayed |
| Reservation Update | Notify the message recipient of updates to an existing reservation. | Itinerary changes, Location changes, Cancellation is confirmed, Hotel booking is canceled, Car rental pick-up time changes, Room upgrade is confirmed |
| Appointment Update | Notify the message recipient of a change to an existing appointment. | Appointment time changes, Appointment location changes, Appointment is canceled |
| Transportation Update | Notify the message recipient of updates to an existing transportation reservation. | Flight status changes, Ride is canceled, Trip is started, Perry has arrived |
| Ticket Update | Send the message recipient updates or reminders for an event for which a person already has a ticket. | Concert time changes, Event location changes, Show is canceled, A refund opportunity is made available |
| Issue Resolution | Notify the user of an update to an issue that was initially reported on the chat | The issue is resolved, Issue status is updated, Issue requires a request for additional information |
| Alert | Send important updates or news to users. | Business hours/hours of availability times |
You can find example WhatsApp messages for all the categories here.