✨ PayPal Trigger node documentation

docs/nodes/nodes-library/trigger-nodes/PayPalTrigger/README.md

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+---
+permalink: /nodes/n8n-nodes-base.payPalTrigger
+---
+
+# PayPal Trigger
+
+[PayPal](https://paypal.com) is a digital payment service that supports online funds transfers and that customers can use when shopping online.
+
+::: tip 🔑 Credentials
+You can find authentication information for this node [here](../../../credentials/PayPal/README.md).
+:::
+
+## Example Usage
+
+This workflow allows you to receive updates when a billing plan is activated in PayPal. You can also find the [workflow](https://n8n.io/workflows/653) on n8n.io. This example usage workflow would use the following node.
+- [PayPal Trigger]()
+
+The final workflow should look like the following image.
+
+![A workflow with the PayPal Trigger node](./workflow.png)
+
+### 1. PayPal Trigger node
+
+1. First of all, you'll have to enter credentials for the PayPal Trigger node. You can find out how to do that [here](../../../credentials/PayPal/README.md).
+2. Select 'Billing Plan Activated' from the ***Events*** dropdown list.
+3. Click on ***Execute Node*** to run the node.