Google is facing a significant antitrust lawsuit led by the U.S. Department of Justice (DOJ) over its alleged monopolistic practices in the digital advertising market, which the government claims have stifled competition and harmed both advertisers and publishers. The trial, which began on September 9, 2024, is centered around accusations that Google manipulated advertising auctions, colluded with Facebook, and used its acquisitions, like DoubleClick, to dominate the ad tech landscape. The DOJ is seeking remedies that could include breaking up parts of Google's advertising business, asserting that the company's control allows it to siphon a significant portion of ad revenue. Google's defense argues that it operates in a competitive market and that its practices benefit users and advertisers. This legal battle follows a recent victory for the DOJ in a separate case regarding Google's search engine dominance, marking a pivotal moment for the tech giant and the broader industry. The implications of the trial could reshape Google's business model and set a precedent for future antitrust actions against major tech companies.