Publisher Page
A user loads a page containing an available ad impression.
PROGRAMMATIC ADVERTISING SANDBOX
Understand how an impression becomes an ad.
Learn the programmatic ecosystem hands-on. Change auction parameters, run simulated bids, inspect outcomes, and see how the pieces fit together.
300 × 250
Ad Slot
Waiting for an auction…
Simulated inventory. No real ads are served.
LIVE VIEW
Auction Inspector
Auction #—
| Demand source | CPM | Latency | Result |
|---|---|---|---|
| Run an auction to generate bids. | |||
Floor: €0.50
Timeout: 1000 ms
Winner: —
NEW IN V0.2
Auction Timeline
Watch one impression move from request to response, validation, and winner selection.
No auction to inspect yet
Choose your settings and run an auction. Events will appear here in chronological order.
AUCTION OUTCOME
Waiting for an auction…
The highest eligible bid received before the timeout wins.
ARCHITECTURE
The Programmatic Flow
Follow one impression from the publisher page to the final creative.
Prebid.js
Demand sources are asked for bids within a defined timeout.
SSP
Supply-side infrastructure packages and forwards opportunities.
DSP
The impression is evaluated and a bid or no-bid decision is returned.
Ad Server
The eligible demand is compared and the winning line item is selected.
Creative
The selected ad is rendered back into the publisher's ad slot.
MODULES
Interactive Labs
Future modules can become individual lessons inside the project.
Header Bidding
Explore parallel bidding and Prebid.js.
OpenRTB Inspector
Inspect bid requests and responses.
Bid Floors
See how floor prices change eligible demand.
Timeouts
Understand how latency removes otherwise good bids.
ads.txt
Learn publisher authorization and supply integrity.
Consent Signals
Experiment with privacy and consent scenarios.
ABOUT THE PROJECT
Built to make the pipes visible.
Programmatic Lab is a learning project. Version 0.2 simulates auctions entirely in the browser and makes every auction decision observable on a chronological timeline. Later versions can add Prebid.js, a real backend, OpenRTB, simulated SSP and DSP services, ads.txt, sellers.json and supply-chain signals.