Britain's antitrust regulator said on Tuesday it would investigate Google's search services using its new powers to see how they impact consumers and businesses, including advertisers, news publishers and rival search engines.
The Competition and Markets Authority, which has gained new powers to examine big tech, said search was vital for economic growth and it was critical that competition was working well.
"Millions of people and businesses relied on Google's search and advertising services - with 90% of searches happening on their platform and more than 200,000 UK businesses advertising there," CMA boss Sarah Cardell said in a statement.
"It's our job to ensure people get the full benefit of choice and innovation in search services and get a fair deal."
The CMA's move comes after U.S. prosecutors in November argued to a judge that Google must sell its Chrome browser, share data, and search results with rivals, and take a range of other measures to end its monopoly on online search.
Google did not immediately respond to a request for a comment.
