Meta is abandoning the use of independent fact checkers on Facebook and Instagram, replacing them with X-style "community notes" where commenting on the accuracy of posts is left to users.
Chief executive Mark Zuckerberg said third-party moderators were "too politically biased" and it was "time to get back to our roots around free expression".
Zuckerberg and other tech executives are seeking to improve relations with US President-elect Donald Trump before he takes office later this month.
In a wide-ranging news conference on Tuesday, when asked whether he thought Meta was introducing the changes due to threats he had made towards the company, Trump replied, "Probably."
At the same event, he also said he wanted to rename the Gulf of Mexico to the Gulf of America.
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