The Justice Department is advancing its antitrust probe of Google with a more specific focus on how its third-party advertising business works with advertisers and publishers. The DOJ is also posing more detailed questions to executives inside the company, its rivals, advertising agencies, ad technology companies and publishers among others. Those questions center around Google’s integration of its ad server with its ad exchange, and Google’s requirement for advertisers to use its tools to buy ad space on YouTube. Continue reading DOJ’s Probe Into Google Focuses on Third-Party Ad Tools