Google Ad Manager

Dominant publisher ad server and ad exchange platform globally, ruled by a U.S. federal court in 2025 to hold illegal monopoly positions in both markets

Google Ad Manager is a digital ad management platform launched by Google in 2018, combining the capabilities of two former DoubleClick products — DoubleClick for Publishers and DoubleClick Ad Exchange — into a unified service.¹ It serves advertisers, publishers, and ad servers, enabling advertisers to manage creative inventory, publishers to manage ad space, and ad servers to determine which ads to serve and where.¹ Through a single platform, users can deliver, measure, and optimize ads across devices and channels including CTV, AMP, mobile apps, and YouTube.² A core function of the platform is its reporting suite, which covers campaign performance, creative analysis, network geography, device and browser data, and billing, among other metrics.¹ The platform also supports granular audience targeting by device, browser, language, operating system, and geographic location.¹ In 2023 the U.S. Justice Department filed an antitrust suit against Google over its ad tech products, and in April 2025 a federal judge ruled that Google had illegally monopolized the publisher ad server and ad exchange markets.¹ Source 1: wikipedia.org — Google Ad Manager Source 2: monetizemore.com — What Is Google Ad Manager? How to maximize Revenue ...