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Domain · Technical Depth

Walk me through what happens in the milliseconds between a page loading and a programmatic display ad appearing — where the bid request originates, and what an SSP versus a DSP is actually doing.

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When the page loads, header-bidding code — usually Prebid — runs parallel auctions in the browser and passes bids into the publisher's ad server, which also calls its SSP.…

The full answer: structure, worked example, likely follow-up.

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