The European Commission has fined Google €2.95 billion ($3.5 billion) for abusing its dominance in the digital advertising technology market and favoring its adtech services over those of its competitors.

Google was also ordered by the EU’s top antitrust regulator to stop anti-competitive and “self-preferencing” practices and take measures to mitigate future conflicts of interest in the adtech market.

Lee-Anne Mulholland, Google’s Global Head of Regulatory Affairs, told BleepingComputer that the antitrust regulator’s decision was wrong and that the company will appeal it.