A customer's explicit permission for a business to message them on WhatsApp.
An opt-in is the explicit consent a customer gives before a business may message them on WhatsApp. Meta requires businesses to collect opt-ins, and sending to people who have not opted in harms your quality rating and can get the number blocked.
Opt-ins can be collected on a website, at checkout, via a form, or through a WhatsApp message the customer sends first.
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WhatsApp broadcasts, chatbots and a shared inbox on Meta's official platform.
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Related terms
- WhatsApp Business API
- Shared Team Inbox
- Message Categories
- 24-Hour Service Window
- Click-to-WhatsApp Ads (CTWA)
- Webhook