Event Notification - Setup eBay Event Notification
The Event Notification Tool retrieves the Application URL for the plug-in from eBay and allows you to view and change it.
The Application URL is called by eBay to notify the plug-in of events occurring on the eBay web site such as new orders for your products.
The application URL is usually:
https://yourstore/cron/ebaycron.php
When a transaction occurs in your eBay store, eBay will call the URL which runs the ebaycron.php script. The scrip downloads recent orders from eBay and processes any that haven't already been processed.