"The Justice Department is seeking the breakup of Google’s business brokering digital advertising across much of the internet, a major expansion of the legal challenges the company faces to its business in the U.S. and abroad. A lawsuit filed Tuesday, the Justice Department’s second against the Alphabet Inc., alleges that Google abuses its role as one of the largest brokers, suppliers and online auctioneers of ads placed on websites and mobile applications. The filing promises a protracted antitrust battle with wide-ranging implications for the digital-advertising industry..." [Paywall] https://www.wsj.com/articles/u-s-su...iolations-in-its-ad-tech-business-11674582792