---
schema_version: "1"
id: b927fecc20621a4cd7438adf8d1ecd3e70672cd93cc7de3ae893f9a8b9b1098d
title: WhatsApp Events
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/marketing-cloud/guides/mc-apis/engagement_ott_events.md
canonical_url: https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/engagement_ott_events.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: c34f7d4f6e9d941d79a184c0df6b781784dc76a231195b2ae4621038f2106b9e
products:
  - Marketing Cloud Engagement APIs and Programmatic Languages
  - Marketing Cloud
---
# WhatsApp Events

Over-the-Top (OTT) messaging refers to messages sent directly to users over the internet, as opposed to messages delivered through carrier-operated systems such as SMS. In Marketing Cloud Engagement, OTT messaging refers specifically to messages that you send using WhatsApp.

Event Notification Service provides notification events for these types of OTT messages:

- [OTT Mobile-Originated Events](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/engagement_ott_events_mobile_originated.md)
- [Engagement OTT Delivery Receipt Events](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/engagement_ott_events_delivery_receipts.md)
- [Transactional OTT Events](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/transactional_ott_events.md)