Overview
Commerce media is entering a new phase of maturity, with global investment expected to exceed $300 billion by 2030. As investment accelerates, advertisers, agencies and procurement teams are placing increased scrutiny on whether media investments are effective.
Incrementality is a critical measurement approach to determine how marketing impacts outcomes. However, varying methodologies, inconsistent definitions and limited transparency have made incrementality difficult to assess, validate and compare across platforms.
AAM’s Incrementality Certification provides independent validation of how organizations measure incrementality. It evaluates whether methodologies are aligned with industry guidelines, accurately measure advertising’s impact on business results and are communicated with transparency and accountability.
This guide outlines the certification process and provides information to support organizations in aligning with AAM’s Incrementality Certification framework, which focuses on three core areas:
- Measurement methodology and data sources
- Incrementality reporting and causal analysis
- Transparency and disclosure practices
Certification Process
AAM’s certification is a collaborative process designed to assess an organization’s approach to measuring incrementality.
The process includes:
- Launch Meeting
AAM introduces the framework, reviews requirements for certification and aligns on scope and methodologies to be evaluated. - Checklist Completion and Documentation Submission
The organization provides supporting documentation on methodologies, data sources, reporting practices and disclosures needed to support the certification findings. - AAM Review and Gap Analysis
AAM reviews these materials to evaluate the company’s alignment with industry guidelines and identifies any gaps in methodology, documentation or transparency. - Certification and Reporting
Upon successful completion, AAM issues a comprehensive management report indicating that the organization’s incrementality methodology meets program requirements, along with overall findings and recommendations. Certified companies also receive AAM’s certification seal to include on their websites and marketing materials and are also included on AAM’s Assurance List, a directory of clients that have demonstrated their commitment to transparency and assurance through independent audits and industry certifications.
AAM Incrementality Certification Guidelines: 3 Key Areas
AAM’s Incrementality Certification is designed to meet you where your product is in its lifecycle. It is a collaborative process that helps companies demonstrate transparency and trust today.
Based on industry-developed guidelines, including IAB and IAB Europe’s Guidelines for Incremental Measurement in Commerce Media released in November 2025, the certification provides transparency and confidence that the incrementality methodology is valid and meets these guidelines. The certification promotes consistency, credibility and transparency while allowing flexibility across different business models and measurement approaches.
1. Identifying Measurement Methodology and Data Sources
Organizations should clearly define and document the incrementality methodology used and ensure it aligns with the intended use case and measurement objectives. At the same time, organizations should identify, validate and document the data sources that support these methodologies, recognizing that incrementality outcomes are only as credible as the data and assumptions underlying them.
Methodologies may vary and include:
- Experiment-based approaches (e.g., randomized controlled trials, ghost ads, matched markets)
- Model-based counterfactual approaches (e.g., synthetic control, propensity modeling)
- Econometric approaches (e.g., marketing mix modeling, time-series regression)
- Hybrid or proxy approaches (e.g., new-to-brand metrics, baseline vs. exposed analysis)
Organizations should also account for the data inputs required to support these approaches including:
- Deterministic data (e.g., transaction data, logged-in user data)
- Probabilistic data (e.g., modeled or inferred data)
- Supporting calculations and transformations
Guiding principles:
- The methodology should reflect campaign goals, media channels and available data.
- The approach should enable a clear comparison between exposed and unexposed conditions.
- Data sources should be relevant to the measurement objective, appropriately scoped and sufficiently robust to support the methodology.
- Organizations should assess data accuracy, completeness and consistency.
- Any reliance on modeled, inferred or third-party data should be clearly understood and documented.
- Organizations should demonstrate consistency in methodology and data application across campaigns or clearly explain variation.
2. Incrementality Reporting and Causal Analysis
Organizations should ensure that incrementality reporting accurately reflects both delivery metrics and incremental outcomes while demonstrating a valid causal framework that supports credible interpretation of results.
This includes validating:
- Ad exposure and engagement metrics (e.g., impressions, viewability, clicks)
- Retail media and business outcome metrics (e.g., revenue, purchase frequency, basket size, customer acquisition)
- Incrementality calculations derived from these inputs
At the core of this analysis is the ability to demonstrate causal impact. Organizations should ensure their approach establishes a sound causal framework including:
- A defined counterfactual (“what would have happened without the marketing activity”)
- A clearly structured intervention (e.g., test vs. control groups)
- Consideration of factors such as bias, signal versus noise and data sufficiency to support meaningful conclusions
Guiding principles:
- Reported metrics should be consistent, well-defined and reproducible.
- Incrementality calculations should be methodologically aligned with the chosen approach.
- Measurement approaches should isolate incremental effects from confounding factors.
- Bias (selection, sampling, environmental) should be identified and mitigated where possible.
- Organizations should ensure that inputs, methodologies and outputs are traceable and explainable.
- Results should reflect statistically meaningful signals rather than randomness or insufficient data.
3. Transparency and Disclosures
Transparency is essential to building trust and enabling comparability across the ecosystem. To achieve this when measuring incrementality, organizations should document and disclose:
- The methodology used
- Key assumptions underlying the approach
- Limitations and constraints of the methodology
- Any factors that may influence interpretation of results
Guiding principles:
- Disclosures should be clear, accessible and easy for stakeholders to comprehend.
- Documentation should enable informed evaluation of results by clients and partners.
- Transparency should balance clarity with appropriate protection of proprietary methods.
Completing the Certification
Once the certification is successfully completed, organizations receive:
- Independent validation that the incrementality methodology is valid and aligns with industry expectations
- A management report outlining findings including gaps and recommendations
- An AAM Incrementality Certification seal for use in marketing and communications
- Inclusion on AAM’s Assurance List of certified organizations
Certification demonstrates that an organization’s measurement approach is:
- Valid and aligned with industry frameworks
- Capable of producing causal insights
- Transparent and accountable to stakeholders
Recertification
To maintain certification, organizations participate in an annual review to ensure that the methodologies, data practices and disclosures remain aligned with evolving industry standards, technologies and regulatory expectations.
Closing Perspective
Incrementality is becoming a foundation of measurement in commerce media. As the industry evolves, establishing shared expectations for how incrementality is defined, measured and communicated will be critical to sustaining trust and enabling growth in the marketplace.
AAM’s Incrementality Certification provides a consistent independent framework for validating industry measurement guidelines and best practices, helping organizations demonstrate that their methodologies meet the expectations of an increasingly sophisticated marketplace.