Why Websites Lost Billions on Ads | Header Bidding Explained

Описание: Every time a page loads, a website has to decide who gets to bid for the ad slot. For years, the way they decided quietly cost publishers a fortune.

In this episode of The Click Circuit we switch to the seller's side of programmatic advertising: how websites sell ad impressions, why the old "waterfall" left money on the table, how header bidding and Prebid fixed it, and why the whole fight ended up in court with Google.

What you'll learn:
What a publisher actually sells: impressions, ad slots and CPM
How the waterfall worked, and why ranking partners by average price lost money
How header bidding lets every bidder compete at the same time
The speed trade-off, and why auctions moved to servers (Prebid Server, Open Bidding)
First-price auctions, bid shading and supply path optimization (SPO)
The Google ad tech antitrust case: the 2025 ruling and the 2026 remedies

Chapters
0:00 Who gets invited to bid?
0:39 What a publisher sells
1:47 The waterfall
2:35 Why the waterfall leaked money
3:35 Header bidding
4:41 The catch: speed
5:34 Moving the auction to a server
6:22 How the auction changed
7:14 Google in court
8:17 Recap
8:39 Next episode: inside the DSP

Missed the earlier episodes?
Ep. 1: Programmatic Advertising Explained: The Hidden Auction Behind Every Ad
Ep. 2: How Ads Follow You: Cookies, IDs and the Cookieless Future

Next time: inside the DSP, the machine that decides in milliseconds what you're worth to an advertiser. Subscribe so you don't miss it.

#programmaticadvertising #headerbidding #adtech