WASHINGTON (AP) — Google's preeminence as an internet search engine is an illegal monopoly propped up by more than $20 billion spent each year by the tech giant to lock out competition, Justice Department lawyers argued at the closings of a high-stakes antitrust lawsuit.

Google, on the other hand, maintains that its ubiquity flows from its excellence, and its ability to deliver consumers the results that it's looking for.

The government and Google made their closing arguments Friday in the 10-week lawsuit to U.S. District Judge Amit Mehta, who must now decide whether Google broke the law in maintaining a monopoly status as a search engine.

Much of the case, the biggest antitrust trial in more than two decades, has revolved around how much Google derives its strength from contracts it has in place with companies like Apple to make Google the default search engine preloaded on cellphones and computers.

At trial, evidence showed that Google spends more than $20 billion a year on such contracts. Justice Department lawyers have said the huge sum is indicative of how important it is for Google to make itself the default search engine and block competitors from getting a foothold.

Google responds that customers could easily click away to other search engines if they wanted, but that consumers invariably prefer Google. Companies like Apple testified at trial that they partner with Google because they consider its search engine to be superior.

Google also argues that the government defines the search engine market too narrowly. While it does hold a dominant position over other general search engines like Bing and Yahoo, Google says it faces much more intense competition when consumers make targeted searches. For instance, the tech giant says shoppers may be more likely to search for products on Amazon than Google, vacation planners may run their searches on AirBnB, and hungry diners may be more likely to search for a restaurant on Yelp.

And Google has said that social media companies like Facebook and TikTok also present fierce competition.

During Friday's arguments, Mehta questioned whether some of those other companies are really in the same market. He said social media companies can generate ad revenue by trying to present ads that seem to match a consumer's interest. But he said Google has the ability to place ads in front of consumers in direct response to queries they submit.

“It's only Google where we can see that directly declared intent,” Mehta said.

Google's lawyer, John Schmidtlein, responded that social media companies “have lots and lots of information about your interests that I would say is just as powerful.”

The company has also argued that its market strength is tenuous as the internet continually remakes itself. Earlier in the trial, it noted that many experts once considered it irrefutable that Yahoo would always be dominant in search. Today, it said that younger tech consumers sometimes think of Google as “Grandpa Google.”

Mehta has not yet said when he will rule, though there is an expectation that it may take several months.

If he finds that Google violated the law, he would then schedule a “remedies” phase of the trial to determine what should be done to bolster competition in the search-engine market. The government has not yet said what kind of remedy it would seek.

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