You’re reviewing impressions for a Programmatic Guaranteed deal in Display & Video 360 that you launched last week, and you notice that it under-delivered. What should you do first to determine why that happened?

If you observe that a Programmatic Guaranteed deal in Display & Video 360 under-delivered last week, your first action should be to use the Deal Troubleshooter.

• See if the line item has multiple targeting assigned.
• Review the campaign-level targeting.
• Contact the publisher.
• Use the Deal Troubleshooter.

Explanation:
The Deal Troubleshooter in Display & Video 360 is a powerful diagnostic tool that helps identify and resolve delivery issues across various deal types, such as private auctions, guaranteed deals, non-guaranteed fixed deals, and open auction line items. It gives a clear, easy-to-understand breakdown of why a deal may not be spending as expected. This tool works with deals from any exchange connected to Display & Video 360, making it especially helpful when a line item is targeting multiple deals. The Troubleshooter delivers detailed insights into impression losses and explains why a line item may not be winning inventory. It quantifies these issues across three different levels, helping advertisers thoroughly understand and fix under-delivery problems.