The Justice Department has reached out to more than a dozen companies in its antitrust probe of Google, including publishers, advertising technology firms and advertising agencies, as the company’s online ad tools become a major focus of the investigation, according to people familiar with the matter. In recent months, the department has been posing increasingly detailed questions—to Google’s rivals and executives inside the company itself—about how Google’s third-party advertising business interacts with publishers and advertisers,...

Source: Wall Street Journal February 05, 2020 12:11 UTC