AdTech Ad Inspector is an application that allows you to view Google Publisher Tag (GPT) ad units and their associated targeting on web pages.

To access the app, you need to add your Chrome browser to your device.

You can now choose which targeting to use on a given ad unit by clicking the "Targeting" button. You can also choose to use multiple ads on a page by clicking the "Add new target" button.

The "All Targets" section shows the full list of targeting information for all ads.