FLEDGE Reporting API: Auction Winner Event

[vineetkahlon]

We want to clarify whether SSPs can receive auction winner events after auction completion irrespective of the outcome of the rendering process with the following information

• Limited contextual signals
• Winning bid
• Winning buyer id
• Highest losing remarketing bid for a buyer other than the winning bidder (for modeling seller’s auction competition)
• Highest losing remarketing bid from the winner (for modeling buyer’s internal auction competition)

Unmatched Queries: We want to clarify whether an auction winner event will be sent even when the query is unmatched, i.e., has no winner.

[michaelkleber]

I think the carve-out for event-level reporting, with full contextual signals, should be limited to things that actually render — that is, when the render_url of the winning ad is handed to a Fenced Frame to render, that's what triggers the event-level reporting.

We can be much more relaxed with the triggers for aggregate reporting, though.