Google has agreed to pay roughly $270 million in fines and change some business practices as part of a settlement announced Monday with French antitrust regulators who had accused the company of abusing its dominance of the online advertising market.

The French competition authority said the agreement was the first time an antitrust regulator had taken direct aim at Google’s online advertising infrastructure, a platform that scores of websites worldwide rely on to sell ads.

The fine is pittance compared to Google’s overall business — its parent company, Alphabet, earned $41 billion last year — but French authorities hailed the concessions they got from Google because they affect technology and practices at the heart of the company’s business.

In the United States, Google is facing similar antitrust scrutiny over its online advertising technology from a group of state attorneys general, as well as from Britain’s antitrust regulator.

French competition regulators said Google used its position as the world’s largest internet advertising company to hurt news publishers and other sellers of internet ads. Authorities said that a service owned by the Silicon Valley giant and used by others to sell advertising across the internet gave Google’s business preferential treatment, undercutting competition.

As part of the settlement, French authorities said Google agreed to end the practice of giving its services preferential treatment and to change its advertising system so that it would work more easily with other services.

Among the companies that complained to French authorities about Google was News Corp., publisher of The Wall Street Journal, and French publisher Rossel La Voix Group, the competition authority said.

Google did not admit to wrongdoing but said in a statement that it would make changes to increase transparency of its online advertising systems and make the technology more interoperable with other services.

The changes apply only in France, but Google said some might eventually be rolled out globally.

Bruno Le Maire, the French finance minister, embraced the agreement.

“It is essential to apply our competition rules to the digital giants who operate in our country,” he said. The accusations of abuse of the advertising technology are “serious,” he added, “and they have been rightly punished.”

This article originally appeared in The NewYork Times.