President Trump had sued Meta and other tech firms in 2021, arguing that he had been wrongfully censored by them. Meta also reported revenue and profit growth for the fourth quarter.

After visiting President-elect Donald J. Trump in November, Mr. Zuckerberg decided to relax Meta’s speech policies. He asked a small team to carry out his goals within weeks. The repercussions are just beginning.

The social networking giant will stop using third-party fact checkers and instead rely on users to add notes to posts. President-elect Trump and his conservative allies said they were pleased.