Ad Auction Inspector is a Chrome DevTools extension designed for monitoring ad auctions in real-time. It specifically tracks Prebid.js and Google Publisher Tag (GPT) auction activities, providing users with detailed insights into the auction lifecycle events. This tool is particularly beneficial for engineers and developers looking to analyze ad performance and optimize their advertising strategies.

The extension captures critical data regarding auction outcomes, allowing users to see which ads won specific slots and the reasons behind these results. By correlating GPT render data with auction events, it provides a comprehensive view of ad performance, making it easier for users to troubleshoot issues and improve ad serving efficiency.