History is shaped by the decisions and ventures of companies and individuals. Only later do we step back to explain how markets ended up structured the way they are—and to identify inefficiencies, distortions, or outright failures. Yield is an excellent illustration of this process applied to the modern display advertising market.
Ari Paparo explains how Google became the dominant force not only in search advertising—which it effectively invented—but also across the entire display ad tech ecosystem. This dominance was not the result of luck or inevitability. Instead, it emerged from a deliberate sequence of acquisitions, technological advances, and aggressive market practices that sidelined competitors and placed Google in a position of power over both buyers and sellers.
The acquisition of DoubleClick was foundational. It allowed Google to build a fully integrated stack covering the whole market, positioning itself simultaneously as seller, buyer, and broker. Internal initiatives such as Bernanke, Poirot, and Bell further reinforced this power by reshaping auction mechanics and pricing rules to favor Google’s own platforms.
These practices eventually placed Google at the center of multiple antitrust lawsuits. In 2025, U.S. courts ruled that Google’s control of the ad server and ad exchange markets constituted a monopoly.
The book is dense and highly detailed, with a large cast of actors and technologies, making it easy to get lost at times. However, core concepts such as real-time bidding, dynamic allocation, header bidding, and waterfalls are explained thoroughly and in historical context. For readers willing to engage with its complexity, Yield offers one of the most authoritative accounts of how today’s digital advertising market came to be.