# Customer.io Trigger
Customer.io (opens new window) enables users to send newsletters to selected segments of customers using their website data. You can send targeted emails, push notifications, and SMS to lower churn, create stronger relationships, and drive subscriptions.
You can find authentication information for this node here.
# Example Usage
This workflow allows you to receive updates when a subscriber unsubscribes in Customer.io. You can also find the workflow (opens new window) on n8n.io. This example usage workflow would use the following node.
The final workflow should look like the following image.
# 1. Customer.io Trigger node
- First of all, you'll have to enter credentials for the Customer.io Trigger node. You can find out how to do that here.
- Select 'Customer Unsubscribe' from the Event dropdown list.
- Click on Execute Node to run the node.
💡 Activate workflow for production
You'll need to save the workflow and then click on the Activate toggle on the top right of the screen to activate the workflow. Your workflow will then be triggered as specified by the settings in the Customer.io Trigger node.