You created a Universal Device Poller.

To identify the custom poller within the trigger condition, you need to use the Unique Name of your UnDP. The Unique Name is a user-defined identifier that you assign to your custom poller when you create it using the Universal Device Poller tool. The Unique Name is also used to reference the custom poller in the Orion database and the web console. When you select “I want to alert on: Custom Poller” in the alert configuration, you can choose the specific custom poller by its Unique Name from the list of available pollers. You can also use the Unique Name to filter, group, or sort the custom poller data in reports, charts, or tables. References: Create a custom poller, Create an alert for a custom poller, View custom poller data