WhatsApp Business API enables high-engagement messaging with rich features like images, documents, interactive buttons, and more.
When to Use WhatsApp
- Customer support: Rich media and quick replies
- Marketing campaigns: Higher open rates than SMS (90%+ vs 20%)
- Order updates: Detailed information with images and tracking
- International messaging: Often cheaper than SMS
Basic WhatsApp Message
The 24-Hour Conversation Window
WhatsApp enforces a conversation window that determines what types of messages you can send:
Sending a session message outside the 24-hour window will fail. Use templates for messages outside the window.
Message Types
WhatsApp supports rich message formats beyond plain text:
Session Messages (within 24h window)
Template Messages (anytime)
Pre-approved messages that can be sent outside the 24-hour window. See Templates Guide.
Delivery Status
WhatsApp provides detailed delivery tracking:
WhatsApp is the only channel that provides “read” receipts, useful for tracking engagement.
Quality Rating
Meta tracks your messaging quality. Maintain good standing by:
- Getting opt-in consent before messaging
- Respecting user preferences - stop messaging users who don’t respond
- Sending relevant content - avoid spam-like messages
- Responding promptly - engage within the 24-hour window
Low quality ratings can result in reduced messaging limits or account suspension.
Common Errors
Next Steps