Multiple advertisement slots exist on the page where ad auctions occur among various participants. This auction setup is quite intricate, involving multiple players bringing diverse signals. At times, debugging the setup becomes necessary to gain a precise understanding of the auction's proceedings. The Prebid ecosystem, having evolved significantly, offers numerous methods and tools for bugging auction setups. Prebid auctions provide a range of event handlers to disseminate information about these events. List of the available events is maintained here, https://docs.prebid.org/dev-docs/publisher-api-reference/getEvents.html

Protected audience auctions prioritize privacy at their core. Consequently, individual participants are unable to access data points of other participants. Unlike analytics partners within Prebid, no player can join the auction solely to collect data that would help consolidate auction-related data points.

More details about the Prebid Chrome extension, Professor Prebid, can be found here: https://docs.prebid.org/tools/professor-prebid.html
Following are some screenshots of the open-source debug tool developed by the Prebid community:

Configuration of each Ad unit / Ad Slot:

Details of the bid received:

Timelines of the bid response:

The tool also creates an overlay on the actual ad-slot on the page:

Considering the privacy-centric nature of the protected audience auction, no external script on the page can gather all the internal details of the protected audience auction so it would be helpful for the community if Google Chrome team develops some tool to display all such details in the Chrome Dev Tools. We will be happy to contribute for the development efforts.

Due to the privacy-focused design of the protected audience auction, external scripts present on the page are unable to access comprehensive internal details of these auctions. It would greatly benefit the community if the Google Chrome team could create a tool within Chrome Dev Tools to showcase these otherwise inaccessible details. We're eager to contribute to the development efforts required for this initiative. This tool would serve as a valuable resource, offering visibility into the intricate workings of protected audience auctions without compromising their privacy-centric structure.

Following is a list of features we would like the tool to have:

• Display the ad-slot level details.
• List of participants: component sellers, buyers, interest groups with respective configs
• Details of the real-time signals: trusted bidding signals, trusted scoring signals
• Auction configs and other signals
• Received bids per seller with renderingURL, ad-metadata, k-anonymity score.
• List the network calls separately apart from the usual Network Tab
• Timeline of events