A judge has ruled that Google's advertising business constitutes a monopoly, significantly impacting the tech giant's operations and leading to potential changes in how it conducts its ad business. This decision is part of ongoing scrutiny regarding competition and regulatory practices in the digital advertising market.

A federal judge ruled that Google has created an illegal monopoly in the online advertising sector, violating the Sherman Antitrust Act. This ruling, the second in recent months against Google’s market practices, may prompt the Justice Department to push for the sale of some of the company's advertising assets. Google plans to appeal the decision.

Google is in the final phase of an antitrust case focusing on its dominance in digital advertising. U.S. District Judge Leonie Brinkema is evaluating potential remedies to enhance competition in the ad tech market, following earlier rulings that found Google had illegally monopolized online auction technology.