Observed Signal · Jun 24, 2026 · Technical Release · Source: https://iabtechlab.com/feed/ · Impact: 3/5 · Sentiment: Positive
IAB Tech Lab Publishes Programmatic Auction Definitions
The IAB Tech Lab has released the final Programmatic Auction Definitions document, developed with its Programmatic Supply Chain subgroup to provide a common vocabulary for how digital auctions operate in OpenRTB environments. The work supplements the Media Rating Council’s Digital Advertising Auction Transparency Standards, which were produced by the MRC’s Auction Standards Working Group to promote disclosure and standardization of auction rules and scoring. The definitions followed a public comment period in January–February 2026 and are available on GitHub. The announcement cites prior 2025 collaboration between the Media Rating Council, Omnicom Media Group and industry bodies (ANA, WFA, 4A’s, and IAB Tech Lab) to improve transparency in digital advertising auctions.
A standards/definitions release that increases transparency and creates a common vocabulary for programmatic auctions; this affects buyers, sellers, and platform interoperability but is not a major platform policy change.
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Key Takeaways & Evidence Grounding
- Media Rating Council, Omnicom Media Group, ANA, WFA, 4A’s, and IAB Tech Lab collaborated in 2025 to address transparency in digital advertising auctions.
- The MRC’s Auction Standards Working Group issued the Digital Advertising Auction Transparency Standards to promote disclosure and standardization of auction rules and scoring.
- IAB Tech Lab created the Programmatic Auction Definitions as supplemental material for the OpenRTB use case, in collaboration with its Programmatic Supply Chain subgroup.
- IAB Tech Lab released the final Programmatic Auction Definitions after a public comment period in January–February 2026; the document is published on GitHub.
- The webpage metadata lists the publication date as 2026-06-24.
Connected Companies & Entities
4 Entities mapped“In 2025, the Media Rating Council, Omnicom Media Group, and a coalition of industry bodies (ANA, WFA, 4A’s, and IAB Tech Lab) came together ...”
“In 2025, the Media Rating Council, Omnicom Media Group, and a coalition of industry bodies (ANA, WFA, 4A’s, and IAB Tech Lab) came together ...”
“In 2025, the Media Rating Council, Omnicom Media Group, and a coalition of industry bodies (ANA, WFA, 4A’s, and IAB Tech Lab) came together ...”
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
New MRC Standards Demand Transparency in Ad Auctions
The Media Rating Council (MRC) published new standards and a voluntary certification to increase transparency around digital ad auction mechanics. The framework requires platforms to disclose auction rules and key decision variables (for example whether auctions are first-price, second-price or modified second-price), and to report changes to auction logic. The standards push for wider adoption of updated OpenRTB fields (including video.plcmt), universal transaction IDs (TIDs), Global Placement IDs (GPIDs) in bid requests, and a multi-bid submission requirement for DSPs. The initiative was driven by Omnicom/OMD and formed with a steering team in 2024, garnering support from nearly 70 companies including Meta, TikTok, X, The Trade Desk and Hearst. Participation and accreditation are voluntary; Google, Amazon and Prebid did not directly participate in drafting the standards.
IAB Tech Lab Updates OpenRTB for Live Content
IAB Tech Lab has proposed updates to the OpenRTB standard to give programmatic buyers and sellers clearer, structured signals about "liveness" in bid requests and to improve pricing transparency. The changes add two optional fields and clarify an existing field in OpenRTB and AdCOM so sellers can indicate whether content is truly live, real-time but not strictly live, or in its first broadcast window. The proposal also refines substitution macros to better communicate discounts and net pricing between sellers and demand-side platforms. The work comes from IAB Tech Lab’s Programmatic Supply Chain working group and is open for public comment through May 28, 2026. The aim is to reduce ambiguity and friction as CTV and live-event inventory grow in programmatic channels.
IAB Tech Lab Proposes Programmatic Rules
IAB Tech Lab has released for public comment its Programmatic Standard Practices v1, a set of shared business rules, norms, and principles for using existing programmatic advertising standards. The proposal aims to reduce transaction friction, improve transparency, and establish consistent governance across the programmatic ecosystem. It is the first deliverable from the Programmatic Governance Council, which addresses business and governance issues in programmatic advertising. The practices focus on how companies should use existing technical standards, not introducing new ones. Public comment is open until October 16. This initiative seeks to clarify expectations between buyers and sellers and strengthen trust among the numerous intermediaries in the ecosystem.
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