# Ad Measurement Weekly

> The independent weekly covering attribution, incrementality testing, media mix modeling, privacy changes, and the business of advertising measurement.

## About

Ad Measurement Weekly publishes weekly analysis and news about the advertising measurement industry. Topics include attribution, incrementality testing, geo-experiments, media mix modeling (MMM), privacy and cookie deprecation, retail media measurement, CTV/streaming measurement, attention metrics, and data clean rooms.

## Articles

- [Nielsen's $2.15 Billion DoubleVerify Acquisition Reshapes Ad Verification and Puts Measurement Independence to the Test](https://admeasurementweekly.com/posts/nielsen-doubleverify-acquisition-ad-measurement-independence): Nielsen agreed to acquire DoubleVerify for $2.15 billion on August 6, combining audience measurement with ad verification under one roof. Coming just eight months after private equity firm Novacap took rival IAS private for $1.9 billion, the deal means both of the industry's largest independent verification companies now sit inside bigger entities — raising urgent questions about whether the third-party measurement stack advertisers depend on can remain truly neutral.
- [IAB Releases 'Measuring Visibility in the AI Era' Framework to Standardize How Brands Track AI Search Presence](https://admeasurementweekly.com/posts/iab-measuring-visibility-ai-era-framework-4ps-measurement-standard): The IAB published its first measurement guidelines for AI-powered discovery on August 3, organizing brand and publisher visibility into a four-level hierarchy — presence, prominence, portrayal, and persuasion — while introducing a two-tier quality standard that classifies most current AI visibility data as directional at best. With more than 20 vendors selling AI visibility tools that produce conflicting results for the same brand, the framework aims to impose the kind of measurement discipline that took display advertising a decade to develop.
- [ChatGPT Ads Adds Conversion Bidding, App Attribution, and Competitive Intelligence in Rapid Measurement Build-Out](https://admeasurementweekly.com/posts/chatgpt-ads-conversion-bidding-app-attribution-measurement-push): OpenAI shipped eight new advertising capabilities on July 24, including conversion-optimized bidding, AppsFlyer and Adjust integrations for app attribution across seven markets, and advanced matching — while Dentsu and Adthena launched the first competitive intelligence tool for ChatGPT auctions. The updates close significant measurement gaps but third-party verification and published attribution windows remain absent.
- [VideoAmp and Nielsen One Ads Both Withdraw from MRC Accreditation, Narrowing the Field for Audited TV Measurement](https://admeasurementweekly.com/posts/videoamp-nielsen-one-ads-mrc-accreditation-withdrawal-tv-measurement): The MRC's Q2 2026 accreditation update revealed that both VideoAmp and Nielsen One Ads have withdrawn from the accreditation process — VideoAmp to address pre-audit feedback with plans to reassess in 2027, and Nielsen One Ads due to planned material methodological changes. The withdrawals leave Comscore as the only TV measurement provider holding both full JIC certification and MRC accreditation.
- [Retail Media Networks Are Buying Their Way Into CTV — And Rewriting Video Measurement in the Process](https://admeasurementweekly.com/posts/retail-media-ctv-convergence-walmart-vibe-target-directv-closed-loop): Walmart's $1.4 billion acquisition of Vibe.co, new integrations piping shopper data into Google DV360 and Yahoo DSP, and Target Roundel's DirecTV pilot all point to the same thesis: retailers are building full-stack video advertising platforms where first-party purchase data closes the measurement loop that CTV has always lacked.
- [LiveRamp Becomes First Independent Measurement Partner for ChatGPT Ads via Conversions API Hub](https://admeasurementweekly.com/posts/liveramp-openai-chatgpt-ads-conversions-api-measurement): LiveRamp announced that advertisers running ChatGPT ad campaigns can now use its Conversions API Hub to connect conversion events back to OpenAI's platform via encrypted server-to-server connections. The integration makes LiveRamp the first independent ad tech company to pipe conversion data into ChatGPT's advertising infrastructure, addressing a measurement gap as OpenAI scales from pilot to self-serve.
- [Google Rebuilds Its Measurement Stack at GML 2026: Meridian Moves Into Analytics 360 and a New Predictive Metric Arrives](https://admeasurementweekly.com/posts/google-marketing-live-2026-measurement-meridian-ga360-qualified-future-conversions): At Google Marketing Live on May 20, Google announced four measurement tools that collectively redefine how advertisers prove ad impact: Meridian integrated directly into Google Analytics 360, Qualified Future Conversions powered by Gemini, Campaign Type Attribution for isolating Demand Gen's contribution, and Attributed Brand Searches for tracking YouTube-driven brand lift. The moves position Google to own the full measurement journey from causal modeling to predictive attribution.
- [Publicis Acquires LiveRamp for $2.2 Billion, Betting That Owning the Identity Layer Wins the AI Era](https://admeasurementweekly.com/posts/publicis-acquires-liveramp-identity-measurement-agentic-ai): Publicis Groupe announced a $2.2 billion all-cash acquisition of LiveRamp, the largest independent data collaboration and identity resolution platform in ad tech. The deal gives Publicis control of the RampID identity graph that connects over 25,000 publisher domains and 500 technology partners — infrastructure the holding company plans to use as the foundation for agentic AI marketing and closed-loop measurement.
- [Nine TV Publishers Unite Behind OpenAP to Build the First Cross-Publisher Conversion API for Television](https://admeasurementweekly.com/posts/openap-nine-tv-publishers-cross-publisher-capi-outcomes-measurement): A+E, AMC, Fox, Hallmark Media, NBCUniversal, Paramount, Scripps, TelevisaUnivision, and Warner Bros. Discovery have partnered with OpenAP to create a standardized conversion API that lets advertisers connect first-party outcome data to ad exposure across all nine publishers through a single integration. The move could reshape how outcomes-based TV deals are measured and scaled.
- [Google Launches Meridian GeoX and Studio to Bring Causal Incrementality to Its Measurement Stack](https://admeasurementweekly.com/posts/google-meridian-geox-studio-incrementality-measurement-gml-2026): Google announced three measurement tools on May 5 ahead of Google Marketing Live: Meridian GeoX for open-source geo-based incrementality testing, Meridian Studio as a Cloud-powered enterprise MMM platform, and Data Manager Map View for visualizing cross-platform data flows. The push positions Google's stack to cover attribution, MMM, and causal experimentation in a single ecosystem.
- [Nielsen Launches Predictive Sales Lift to Democratize Outcomes Measurement Ahead of Upfronts](https://admeasurementweekly.com/posts/nielsen-predictive-sales-lift-outcomes-measurement-upfronts): Nielsen announced Predictive Sales Lift at the POSSIBLE conference, a new Nielsen ONE Ads capability that predicts sales lift for video campaigns across CTV, mobile, and desktop at a fraction of the cost of traditional sales lift studies. General availability is set for May 2026.
- [OpenAI Launches Conversion Pixel for ChatGPT Ads, Staking a Claim in the Measurement Stack](https://admeasurementweekly.com/posts/openai-pixel-chatgpt-ads-conversion-measurement-launch): OpenAI has quietly turned on a conversion tracking pixel for select ChatGPT advertisers, giving LLM ad buyers their first real attribution signal beyond impressions and clicks. The move puts OpenAI on the same structural path Meta and Google walked a decade ago, with all the measurement trade-offs that came with it.
- [Privacy Audit Finds Google, Meta, and Microsoft Ignore Opt-Out Signals Across Thousands of Sites](https://admeasurementweekly.com/posts/webxray-privacy-audit-google-meta-microsoft-opt-out-measurement): A webXray audit of 7,587 California websites found that Google fails to honor Global Privacy Control opt-out signals 87% of the time, Meta 69%, and Microsoft 50%. The findings expose a systemic gap between consent infrastructure and actual tracking behavior — with direct consequences for cookie-based ad measurement.
- [CIMM Paper Argues Programmatic Ad Tech Systematically Undervalues Media Quality](https://admeasurementweekly.com/posts/cimm-media-quality-paper-programmatic-measurement-gap): A new paper from the Coalition for Innovative Media Measurement challenges the ad industry's fixation on short-term outcomes, arguing that programmatic infrastructure ignores measurable differences in media quality. The paper proposes probabilistic metrics like attention scoring and contextual relevance as correctives.
- [The Trade Desk Overhauls Identity Alliance Payouts to Reward Incremental Data Value](https://admeasurementweekly.com/posts/trade-desk-identity-alliance-incrementality-payout-overhaul): The Trade Desk is restructuring how it compensates identity partners in its Identity Alliance, shifting from volume-based payments to an incrementality model that rewards unique signal contribution. The move reshapes the economics of cross-device identity resolution and arrives amid broader tensions with major agency holding companies over transparency.
- [Amazon DSP Emerges as CTV's Measurement Backbone at NewFronts 2026](https://admeasurementweekly.com/posts/amazon-dsp-authenticated-graph-ctv-measurement-newfronts-2026): Samsung, Tubi, and Comcast all announced Amazon DSP integrations at the 2026 IAB NewFronts, positioning Amazon's Authenticated Graph as the connective layer between CTV impressions and measurable outcomes. With an 85% match rate on Tubi and 42% lift in unique reach, Amazon is quietly becoming the infrastructure that makes CTV measurement work.
- [Amazon DSP Emerges as CTV's Measurement Backbone at NewFronts 2026](https://admeasurementweekly.com/posts/amazon-dsp-authenticated-graph-ctv-measurement-newfronts-2026): Samsung, Tubi, and Comcast all announced Amazon DSP integrations at the 2026 IAB NewFronts, positioning Amazon's Authenticated Graph as the connective layer between CTV impressions and measurable outcomes. With an 85% match rate on Tubi and 42% lift in unique reach, Amazon is quietly becoming the infrastructure that makes CTV measurement work.
- [LG Ad Solutions Launches 'Own the Outcome' CTV Measurement Framework at NewFronts](https://admeasurementweekly.com/posts/lg-ad-solutions-own-the-outcome-ctv-measurement-newfronts): LG Ad Solutions unveiled a new outcome-based measurement framework at the 2026 IAB NewFronts, backed by ACR data from 200 million smart TVs globally. The announcement includes programmatic home screen inventory, contextual intelligence for live news, and a creative automation partnership with Magnite.
- [Walmart and Vizio Unify Login Systems to Build Closed-Loop CTV Measurement at Scale](https://admeasurementweekly.com/posts/walmart-vizio-unified-login-closed-loop-ctv-measurement): At its first post-acquisition NewFronts, Walmart revealed how it plans to connect Vizio viewing data to purchase behavior through a unified account system. The result is a closed-loop measurement pipeline that links CTV ad exposure to in-store and online transactions across 150 million weekly shoppers.
- [Google Brings Agentic AI to DV360 and Debuts Privacy-Safe CTV Attribution at NewFronts](https://admeasurementweekly.com/posts/google-newfronts-agentic-ai-dv360-ctv-measurement): Google used its NewFronts presentation to embed Gemini deeper into Display & Video 360, launch Confidential Publisher Match for cross-device CTV attribution, and roll out SKU-level sales reporting with Kroger. The announcements signal a shift toward closed-loop measurement running through Google's programmatic stack.
- [IAB State of Data 2026: 75% of Marketers Say Ad Measurement Is Broken, AI Is the Fix](https://admeasurementweekly.com/posts/iab-state-of-data-2026-measurement-broken-ai-fix): The IAB's annual State of Data report surveyed 400+ buy-side leaders and found that up to 75% believe attribution, incrementality, and MMM fall short on rigor, timeliness, and trust. The industry body estimates AI-driven measurement improvements could unlock $26.3 billion in reallocated media spend.
- [Publicis Tells Clients to Drop The Trade Desk After Audit Reveals Fee Problems](https://admeasurementweekly.com/posts/publicis-drops-trade-desk-audit-fee-transparency-crisis): Publicis Groupe, The Trade Desk's largest holding company client, is advising its agencies to stop recommending TTD after a FirmDecisions audit found improperly applied DSP fees. The move follows Dentsu and WPP quietly exiting OpenPath and sends TTD shares down 12%.
- [A+E Global Media Signs Multiyear Nielsen Deal - Adding Respondent-Level Data, Audience Builder, and Data-Driven Linear API](https://admeasurementweekly.com/posts/ae-global-media-nielsen-multiyear-measurement-deal): A+E Global Media renewed and expanded its Nielsen partnership with a multiyear deal covering measurement and media intelligence across A&E, Lifetime, and The History Channel. The deal adds three new data products - NRLD, Audience Builder, and DDL API - positioning A+E for more targeted upfront selling as Nielsen locks in yet another major media company.
- [NBCU's Winter Olympics Go Fully Programmatic - With Seven DSPs, AI Creative Review, and Real-Time Measurement](https://admeasurementweekly.com/posts/nbcu-winter-olympics-programmatic-measurement-ai): NBCUniversal expanded programmatic access to the Milan Cortina 2026 Winter Olympics from one DSP to seven, used AI to scan 6,000 ad creatives and optimize 10,000 placements simultaneously, and debuted cross-platform measurement tools that delivered campaign performance data within hours instead of days.
- [OpenX and TVision Launch First Supply-Side Attention Targeting for CTV - Moving Eye-Tracking Data Into the Bid Stream](https://admeasurementweekly.com/posts/openx-tvision-supply-side-attention-targeting-ctv): OpenX Attention Targeting uses TVision's 5,000-household eye-tracking panel to build predictive models that filter CTV inventory in real time, excluding anything below a 40% attention score. It's the first time attention metrics have been activated on the supply side, shifting the optimization point from post-campaign reporting to pre-bid decisioning.
- [Criteo Becomes ChatGPT's First Ad Tech Partner - But the Measurement Gap Looms Large](https://admeasurementweekly.com/posts/criteo-chatgpt-ads-measurement-gap): Criteo is the first ad tech company to integrate with OpenAI's ChatGPT advertising pilot, bringing commerce media into conversational AI. Early data shows 1.5x higher conversion rates from AI-referred traffic, but advertisers face a $60 CPM channel with no conversion tracking or attribution.
- [MMM Has Officially Overtaken MTA as the Measurement Method Marketers Trust Most](https://admeasurementweekly.com/posts/mmm-overtakes-mta-measurement-stack-2026): New industry data shows 53% of marketers now use media mix modeling and 67% plan to increase investment - while multi-touch attribution faces an existential crisis from signal loss. Here's where MMM fits in the modern measurement stack, what's driving the shift, and what still needs fixing.
- [Netflix Expands Ads Suite with Conversion API, Amazon and Yahoo Data, and Lumen Attention Measurement](https://admeasurementweekly.com/posts/netflix-ads-suite-capi-amazon-yahoo-lumen): Netflix's March 2026 update brings a proprietary Conversion API that outperformed benchmarks by 75% in early tests, Amazon and Yahoo DSP audience integrations, and Lumen eye-tracking-based attention measurement - a significant maturation of the streamer's ad infrastructure.
- [Meta Redefines Click Attribution and Introduces Engage-Through Measurement](https://admeasurementweekly.com/posts/meta-redefines-click-attribution-engage-through): Meta is overhauling how it counts ad conversions, restricting click-through attribution to link clicks only and introducing a new engage-through attribution category for social interactions. The changes align Meta's reporting with Google Analytics and roll out in March 2026.
- [Google Launches No-Code Scenario Planner to Make Meridian MMM Accessible to Non-Technical Teams](https://admeasurementweekly.com/posts/google-meridian-scenario-planner-no-code-mmm): Google's new Scenario Planner gives marketers a code-free interface to test budget allocations and view real-time ROI estimates on top of its Meridian MMM. Nearly 40% of marketers struggle to connect MMM outputs to business decisions - this tool aims to close that gap.
- [Attention Metrics Move Into Real-Time Bidding as xpln.ai Integrates with Index Exchange](https://admeasurementweekly.com/posts/attention-metrics-move-into-real-time-bidding): The integration embeds AI-powered attention signals directly into the SSP, letting buyers filter inventory pre-bid based on predicted viewer engagement. Combined with Adelaide's 2026 Outcomes Guide showing 33% brand lift and 53% lower-funnel gains, attention is becoming operationalized at scale.
- [Nielsen Launches Co-Viewing Pilot With Wearables as Tubi Deal Signals Streaming Measurement Arms Race](https://admeasurementweekly.com/posts/nielsen-co-viewing-pilot-tubi-streaming-measurement-expansion): Nielsen is piloting wearable-based co-viewing measurement starting with Super Bowl LX, targeting currency integration by the 2026/2027 season. Meanwhile, Tubi's expanded Nielsen deal underscores how ad-supported streamers are racing to prove their audiences are bigger - and more valuable - than legacy metrics suggest.
- [IAB Launches Project Eidos to Overhaul Ad Measurement Across MMM, Attribution, and Incrementality](https://admeasurementweekly.com/posts/iab-project-eidos-measurement-modernization): Backed by 33 companies including Google, Meta, Amazon Ads, and Unilever, Project Eidos is the industry's most ambitious attempt to fix fragmented measurement. The accompanying State of Data 2026 report finds 60-75% of advanced measurement users say current tools fall short.
- [Retail Media Enters Its Accountability Era as Incrementality Measurement Goes From Optional to Expected](https://admeasurementweekly.com/posts/retail-media-accountability-era-incrementality-measurement-2026): Only 15% of marketers rate their retail media measurement as effective, yet brands actively measuring incrementality report 54% reductions in wasted spend. With Albertsons launching in-store incrementality and advertisers averaging six RMNs, the gap between measurement leaders and laggards is widening fast.
- [Twelve States Now Mandate GPC - And Enforcement Is Getting Real](https://admeasurementweekly.com/posts/us-privacy-enforcement-era-measurement-impact): With twelve US states requiring businesses to honor Global Privacy Control signals and seven-figure fines becoming routine, the privacy enforcement era has arrived. Here's what the 2026 enforcement wave means for ad measurement teams.
- [Comscore Goes All In on Cross-Platform Measurement With ESPN Deal, Daily Program Reporting, and Trade Desk Audio](https://admeasurementweekly.com/posts/comscore-cross-platform-measurement-espn-trade-desk-2026): In a flurry of CES 2026 announcements, Comscore launched daily program-level audience reporting powered by AWS AI, signed ESPN as a cross-platform measurement client, and integrated audio targeting and measurement into The Trade Desk. The moves position Comscore as a comprehensive alternative in an increasingly fragmented measurement landscape.
- [PayPal Ads Launches Transaction Graph Measurement - Turning Purchase Data Into an Attribution Engine](https://admeasurementweekly.com/posts/paypal-ads-transaction-graph-measurement-launch): PayPal unveiled its Transaction Graph Insights and Measurement program at CES 2026, offering advertisers deterministic, cross-merchant attribution built on 430 million consumer accounts. It's the first major measurement product built entirely on verified purchase data.
- [Albertsons Media Collective Launches In-Store Incrementality Measurement With Matched-Market Framework](https://admeasurementweekly.com/posts/albertsons-in-store-incrementality-measurement-launch): Albertsons is the first major retailer to offer causal incrementality measurement for in-store digital media. A Mondelez beta campaign delivered a $2.41 iROAS and 14% sales lift. The network plans to expand to 800 additional stores in 2026.
- [Google's Privacy Sandbox Is Officially Dead. Now What?](https://admeasurementweekly.com/posts/google-privacy-sandbox-officially-dead): After nearly five years of development and regulatory scrutiny, Google retired Topics, Protected Audience, and its Attribution Reporting API in October 2025. Third-party cookies are staying in Chrome. Here's what it means for measurement teams.
- [Google's Meridian MMM Is Now Open to All Marketers - And It's Getting Serious](https://admeasurementweekly.com/posts/google-meridian-mmm-open-to-everyone): Google's open-source media mix model is out of beta with 20+ certified measurement partners, support for non-media variables, and channel-level priors. We break down what's new and how it stacks up.
- [MRC and IAB Release Attention Measurement Guidelines - Adelaide Seeks First Accreditation](https://admeasurementweekly.com/posts/mrc-iab-attention-measurement-guidelines): The Media Rating Council and IAB issued comprehensive attention measurement guidelines in November 2025. Adelaide is now the first vendor under MRC review, signaling a push to make attention a tradeable currency.
- [Nielsen and Roku Expand Measurement Partnership in Push for Unified Streaming View](https://admeasurementweekly.com/posts/nielsen-roku-expand-measurement-partnership): The multi-year deal deepens data sharing between the two companies as Roku's devices now account for more than 21% of total TV viewing. Here's what the partnership covers and why it matters for CTV measurement.
- [IAB Releases Retail Media Measurement Standards V2 - With a Deadline for Compliance](https://admeasurementweekly.com/posts/iab-retail-media-measurement-standards-v2): Updated standards expand beyond traditional retail media to cover quick commerce, introduce a refined measurement funnel, and include the industry's first incrementality measurement guidelines for commerce media.
- [The Data Clean Room Market Is Consolidating Fast - And That Might Be a Good Thing](https://admeasurementweekly.com/posts/data-clean-room-era-consolidation): LiveRamp acquired Habu. WPP acquired InfoSum. NIQ launched on Snowflake. After years of fragmentation, the clean room market is entering its consolidation phase. Here's what it means for measurement.
- [Incrementality Testing Has Gone Mainstream: 52% of Brands Now Running Experiments](https://admeasurementweekly.com/posts/incrementality-testing-goes-mainstream): New industry data shows over half of brands and agencies are using incrementality testing. A study of 225 geo-tests establishes the first public benchmarks for incremental ROAS across digital channels.

## Key Topics

- Attribution: How advertisers assign credit for conversions across touchpoints. Includes last-click, multi-touch attribution (MTA), and privacy-preserving attribution APIs.
- Incrementality Testing: Experimental methods (primarily geo-based) to measure the causal impact of advertising spend. The gold standard for proving ad effectiveness.
- Media Mix Modeling (MMM): Statistical models that estimate the contribution of each marketing channel to business outcomes. Tools include Google Meridian, Meta Robyn, and PyMC-Marketing.
- Privacy & Cookies: Changes to tracking infrastructure including Google's Privacy Sandbox retirement, third-party cookie deprecation in Safari/Firefox, and privacy regulations (GDPR, CCPA).
- Retail Media Measurement: Standards and methodologies for measuring advertising on retail media networks (Amazon Ads, Walmart Connect, Instacart, etc.).
- CTV & Streaming Measurement: Cross-platform measurement challenges in connected TV advertising, including partnerships like Nielsen-Roku.
- Attention Metrics: Emerging measurement methodology using eye-tracking and behavioral signals to quantify ad attention. Key players: Adelaide (AU metric), Lumen Research, TVision.
- Data Clean Rooms: Privacy-safe environments for matching advertiser and publisher data. Market consolidation: LiveRamp acquired Habu, WPP acquired InfoSum.