A US judge has ruled that Google violated antitrust laws by monopolizing the advertising technology market.Judge found Google guilty of tying together two parts of its adtech stack, DoubleClick for Publishers (DFP) and Ad Exchange (AdX).Remedies and consequences are yet to be determined, but they could include breaking up Google's ad business and selling off Google Ad Manager.Google's search market dominance is also under scrutiny, with the potential for forced sale of its Chrome business.