“Meta tied its online classified ads service Facebook Marketplace to its personal social network Facebook and imposed unfair trading conditions on other online classified ads service providers. It did so to benefit its own service Facebook Marketplace, thereby giving it advantages that other online classified ads service providers could not match. This is illegal under EU antitrust rules. Meta must now stop this behaviour.”

Facebook has been quick to respond, saying that it will appeal the ruling. “This decision ignores the realities of the thriving European market for online classified listing services and shields large incumbent companies from a new entrant, Facebook Marketplace, that meets consumer demand in innovative and convenient new ways,” the company wrote in a statement.