Marketing
Marketing messages can help businesses achieve a wide range of goals across the funnel, from generating awareness to driving sales to retargeting customers. These messages can include offers and promos, related product suggestions, abandoned cart reminders, and more.

Utility
Utility messages are typically triggered by a user action, like placing an order or submitting a payment. These messages are not promotional, and are either specific to or requested by a user (like a package delivery update) or critical to a user (like a tornado warning).

Authentication
Authentication messages enable businesses to use one-time passwords (OTPs) for identity verification, potentially at multiple stages of the user journey. Ensure successful login or transactions with OTPs on WhatsApp.