Core Points - The U.S. government's remedies trial in the Google antitrust case regarding its advertising technology is set to begin on September 22 [1] - U.S. District Judge Leonie Brinkema ruled that Google is liable for "willfully acquiring and maintaining monopoly power" in online advertising markets [2] - The court found that Google has maintained its monopoly through contractual policies and technological integration between its publisher ad server and ad exchange [3] - An August ruling determined that Google holds a monopoly in internet search, marking a significant antitrust ruling in the tech industry [4] - U.S. District Judge Amit Mehta concluded that Google is a monopolist and has acted to maintain its monopoly in the search market [5] - Google faces challenges not only from antitrust allegations but also from increasing competition in the generative AI market from companies like OpenAI and Anthropic [6]