The majority of the fine - 460 million euros - is justified by the American tech giant's favouring of its own services such as Google Flights and Google Hotels over competing services. The rest of the fine is related to the fact that app developers have been denied certain opportunities outside Google Play.
According to the decision, Google has 60 days to fix the deficiencies if it is to avoid further fines.
The EU has previously fined iPhone manufacturer Apple and Facebook owner Meta 500 million and 200 million euros respectively for violating the same regulation.
When Google was fined by the EU last year, President Donald Trump threatened new tariffs against the EU.
