Digital Advertising Policy Resource Center

A non-partisan guide to understanding digital advertising — how it works, why it matters, and how the industry supports responsible data practices.

Digital advertising is part of the everyday lives of consumers and businesses. It funds the free content Americans rely on, helps small businesses compete, and supports a dynamic and growing digital economy. At the same time, it operates within a complex and evolving legal and regulatory environment designed to protect consumers, promote transparency, and ensure responsible data use.

This resource exists to help legislative and regulatory staff engage in those decisions with practical information about the digital advertising industry — its benefits, its complexity, and the industry’s proactive efforts to protect consumer privacy and advance innovation. We actively seek dialogue on these issues and welcome briefing requests and direct conversations with your office.

What Is Digital Advertising – And Why Does It Matter?

Digital advertising can seem complex, but the basic logic is straightforward: advertisers want to reach relevant customers, publishers want to fund their content, and technology connects them at scale. Most digital advertising involves four groups working together:

• Advertisers are the brands, businesses, and organizations that want to promote products or services to relevant audiences. From a family-owned hardware store trying to reach local homeowners, to a regional hospital promoting a preventive care program, to a Fortune 500 brand running a national campaign, advertisers need an efficient way to reach relevant customers.
• Publishers create the content people use every day: the local newspaper covering city council meetings that might otherwise go unreported; national publications reporting on politics, culture, business, and public affairs; the weather apps and recipe sites used to navigate daily life; and streaming services that have become ubiquitous in mobile and connected TV.
• Platforms and intermediaries connect advertisers and publishers. From helping a local business reach nearby customers to supporting global campaigns across thousands of sites and apps, they enable ads to be bought, delivered, and measured at scale. Largely invisible to consumers, they power the advertising that funds free digital content and services.
• At the center of it all are consumers who benefit from free or low-cost search, news, entertainment, and information, precisely because advertisers pay to reach them. When this system works well, it supports an efficient, diverse, and competitive media landscape, giving businesses of every size the ability to find customers while delivering everyday value to the public.

How Personalized Advertising Works

A step-by-step visual explanation of how digital advertising operates in real-world scenarios.

Understanding the Digital Ecosystem

A video series providing an in-depth look at how the digital advertising ecosystem functions.

Common Advertising Data Flows

A presentation illustrating common advertising scenarios and data flows.

Measuring the Digital Economy

A comprehensive IAB study examining the size, scope, and economic contribution of the digital economy, including employment, productivity, and growth supported by digital advertising.

Consumers, Content and Assessing the Data Value Exchange

A collection of IAB consumer research related to privacy expectations, transparency, and trust in digital advertising. These materials provide context on how consumers perceive advertising-supported services and data use.

The Consumer Perspective on Privacy, Preference, and Personalization

Research examining how consumers view personalized advertising, privacy preferences, and the tradeoffs involved, including attitudes toward relevance, choice, and transparency.

Small Business Perspectives

Examples from the Internet for Growth coalition illustrate how small and local businesses use digital advertising in practice to reach customers, grow revenue, and compete in the modern economy.

Privacy and Consumer Protection

Digital advertising depends on consumer trust, making strong privacy and consumer protections essential to the long-term success of the marketplace. IAB supports balanced, pragmatic approaches that protect consumers and provide meaningful choices about data while allowing the digital advertising ecosystem to thrive.

Reflecting the importance of these issues, digital advertising operates within a complex and evolving legal environment that includes state privacy laws, unfair and deceptive practices standards, sector-specific federal laws, and private litigation. While requirements vary across jurisdictions, many share a common set of underlying concepts that are essential context for policymaking involving digital advertising.

• Responsible Data Use – Data should be used in ways that align with consumer expectations and for legitimate purposes like advertising, measurement, and fraud prevention. Organizations should collect, use, and retain only the data reasonably necessary for those purposes, thereby reducing privacy risks and protecting consumers from unnecessary exposure. Sensitive data requires a higher bar, including clear limits on use and affirmative consent.
• Transparency – Consumers should be informed in clear, understandable, and accessible ways, about how their data is collected and used in advertising.
• Consumer Control – Individuals should have meaningful options to control how their data is used, including the ability to express privacy elections through tools and signals.
• Due Diligence – Effective compliance depends on understanding how vendors collect, use, and protect data. Ongoing vetting and oversight help businesses manage risk, set clear expectations for partners, and protect consumers across the data lifecycle.
• Third Party Contracts – Data doesn’t stay in one place. Contracts help ensure that privacy obligations and consumers’ choices about how their data is used follow the data across companies.
• Kids and Teens Online – Young people are not just another audience. Because they have different developmental capacities, digital advertising practices should include heightened protections — including limits on data collection and use, along with meaningful parental and teen controls.

Complexity is a defining feature of the current policy landscape. It is one reason why standardized frameworks, technical tools, and shared guidance have become increasingly important for companies seeking to comply consistently across jurisdictions.

How IAB Supports Compliance and Best Practices

Knowing what the law requires is different from knowing how to implement it across thousands of companies, dozens of jurisdictions, and billions of daily ad transactions. As businesses in the digital advertising industry face increasing complexity, IAB’s role is to help bridge that gap – especially for smaller companies and startups that may not have large compliance teams – by translating these legal obligations into practical approaches that support compliance and responsible data practices.

Compliance and Accountability Initiatives

IAB has developed initiatives to help companies demonstrate accountability and good-faith efforts to protect consumer privacy.

Privacy Innovation in Digital Advertising

As privacy expectations evolve, new technologies have emerged to enable advertising measurement and collaboration while decreasing the scope of data disclosure.

Protecting Privacy with Data Clean Rooms

Data clean rooms let companies work with data in secure, controlled environments that help protect personal information while supporting responsible use.

Secure Data Use with Trusted Execution Environments

Trusted Execution Environments (TEEs) allow companies to process data securely while keeping it protected, supporting privacy compliance without limiting essential digital services.

How IAB Tech Lab Supports Privacy by Design

IAB Tech Lab is a global, nonprofit consortium that develops technical standards and tools to help companies protect consumer privacy, reduce fraud, and build a more trustworthy digital advertising industry.

Responsible AI and Risk Management

Artificial intelligence is increasingly used throughout the digital advertising industry – for targeting, creative production, measurement, and fraud detection. IAB has developed guidance to help companies manage emerging risks related to advanced technologies and automated decision-making.

Understanding the Legal Landscape of Generative AI

Key legal issues shaping the use of generative AI, including privacy and intellectual property.

Guidance for Responsible AI in Digital Advertising

IAB is helping companies use AI responsibly by outlining key risks, compliance considerations, and practical steps to protect consumers while supporting innovation.

Clear Rules for AI Disclosure in Advertising

IAB’s guidance focuses on meaningful AI disclosure, helping companies avoid misleading consumers while supporting innovation.

AI, Data Rights, and Intellectual Property

Addressing intellectual property and data issues as companies adopt AI in digital advertising.

Connect With IAB

This page is intended to serve as an entry point for policymakers and regulators seeking to better understand digital advertising.

If you are working on related legislation or oversight, our public policy team can help you.

Molly Crawford

Executive Vice President, Head of Public Policy
IAB

Michael Hahn

Executive Vice President, General Counsel
IAB

Erick Harris

Vice President, Public Policy & Legal Services
IAB

Clayton Barsoum

Director, Public Policy
IAB

Brendan Thomas

Vice President, Policy Communications
IAB