Browse guides
WhatsApp Reference
How WhatsApp itself works, in plain words: Meta's rules and limits, message templates, every message type, webhooks and what each error code means.
Concepts
- What Is Meta? Why WhatsApp Needs a Facebook Account
- Meta Business Portfolio (formerly Business Manager)
- What Is a Meta Developer Account — and What Is an 'App'?
- Message Templates: Parts, Limits & Categories
- Template Review & Rejections
- Template Quality Rating & Pausing
- The 24-Hour Customer Service Window
- Sending Your First Message
- Sending Text Messages
- Webhooks — What and Why
- Webhook Endpoint Setup
- Subscribe WABA Webhook