Google has been fined 2.42 billion euros by the European Commission.
According to EU ruling, Google had abused its power by promoting its own shopping comparison service at the top of search results.
The ruling also orders Google to end its anti-competitive practices within 90 days or face a further penalty.
The European Commission said the world’s most popular internet search engine has 90 days to stop favouring its own shopping service or face a further penalty per day of up to 5 percent of Alphabet’s average daily global turnover.
The action follows a seven-year investigation prompted by scores of complaints from rivals such as US consumer review website Yelp, TripAdvisor, UK price comparison site Foundem, News Corp and lobbying group FairSearch.