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?

When a Programmatic Guaranteed deal under-delivers in Display & Video 360, the Deal Troubleshooter is the essential first step because it provides real-time, granular data on why potential impressions were filtered out before reaching the bidding stage. This specialized tool analyzes the entire delivery funnel—from initial bid requests to final wins—highlighting specific blockers such as restrictive targeting, creative mismatches, or frequency cap limitations that are often invisible in standard reports. By using the troubleshooter first, you can immediately identify if the issue is a technical setting within your control or a lack of inventory from the publisher's side, allowing for a faster and more data-driven resolution than manual campaign reviews or immediate outreach to the publisher.