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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:
  1. Getting opt-in consent before messaging
  2. Respecting user preferences - stop messaging users who don’t respond
  3. Sending relevant content - avoid spam-like messages
  4. Responding promptly - engage within the 24-hour window
Low quality ratings can result in reduced messaging limits or account suspension.

Common Errors

Next Steps