The US president Donal Trump has threatened further tariffs on the EU in retaliation to the $3.45 billion (A$5.27 billion) fine. On Friday, the EU issued Google with a €2.95 billion ($3.45 billion) antitrust fine for anti-competitive practices in its ad tech business, which is Google’s fourth EU penalty in the past 10 years. The EC ordered Google to stop “self-preferencing” practices and take measures to cease its inherent conflicts of interest. “The European Commission’s decision about our ad tech services is wrong and we will appeal. This is on top of the many other fines and taxes that have been issued against Google and other American tech companies, in particular.