> ## Documentation Index
> Fetch the complete documentation index at: https://docs.voucherify.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Segment Entered

The `EVENTS.CUSTOMER.SEGMENT.ENTERED` event indicates that a customer has joined a customer segment. It returns details about the customer and the segment.

When the event is used in a "Customer entered segment" distribution webhook, the `data` object always contains the following required objects:

* `customer`,
* `segment`.

Additional objects are also sent depending on the purpose:

* "Notify customers about promotion" sends also the following objects:
  * `campaign`,
  * `promotion_tier`,
* "Send and publish unique codes from campaign" sends also the following objects:
  * `campaign`,
  * `voucher`,
  * `publication`,
* "Send plain message to customers" sends only the basic objects listed above.

This event is used in a webhook configured in Distributions in Voucherify dashboard.

<Note>This page documents only the event. If you need more details about the webhook payload data that includes this event, go to [Introduction to webhooks](/api-reference/introduction-to-webhooks "Introduction to webhooks v2024-01-01") page.</Note>


## OpenAPI

````yaml /openapi-events/events-customer.json webhook EVENTS.CUSTOMER.SEGMENT.ENTERED
openapi: 3.1.0
info:
  title: Events - Events customer
  version: '2024-01-01'
  description: ''
servers: []
security: []
paths: {}

````