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What’s actually inside a bid request · an interactive series

Every page you open writes a small document about precisely that moment.

It’s called a bid request. It is sent to auction to the advertisers in less time than it takes to blink — and almost no one outside adtech has ever read one. Follow the line, and we’ll open it together. Layer by layer.

Scroll

That was the whole document.

Ten layers, written and sent to auction in roughly the time it took you to read this sentence. If one of them made you curious, the full articles go much deeper — and the comment section and my DMs are open. I read every single one.