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

# MarketingAutomationEntryCondition

> The automation starts only when this trigger-data expression matches. Segments belong on skip conditions, because entry is decided before customer data is loaded.

<ResponseField name="expression" type={<a href="/docs/api-reference/v3/reference/marketing/marketing-automation-condition-expression">MarketingAutomationConditionExpression!</a>} required>
  Trigger-data expression. Unsupported when the stored predicate cannot be written by this API, including Recover checkout predicates.
</ResponseField>


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