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# ActionTypes

Automation action types define the concrete behavior and `config` contract of an [Action](/api-reference/automation/actions.md). [CreateTaskAssignment](/api-reference/automation/action-types/create-task-assignment.md) creates task assignments, [Notify](/api-reference/automation/action-types/notify.md) sends notifications to the action's target users, and [Webhook](/api-reference/automation/action-types/webhook.md) calls an external HTTP endpoint.