Mark Zuckerberg and Elon Musk were once poised to fight in a cage match in 2023, before Zuckerberg called it off, saying that Musk was "not serious." Now, the two billionaires have gone from the brink of battle to using each other's technology.

Meta first announced that it would retire its third-party fact-checking program in January. At the time, CEO Mark Zuckerberg said that the company would replace it with community

Meta will test Community Notes in the US starting March 18. This uses X's technology and allows users to flag false or misleading content. About 200,000 users have signed up to contribute. The system replaces third-party fact-checking with a crowd-sourced model.

Ready for crowdsourced fact-checking on Facebook, Instagram, and Threads? 200,000 people have sign up so far - and the waitlist remains open.

Meta Platforms said on Thursday it would begin testing community notes on its social media platforms in the United States from March 18, more than two months after announcing the end of its fact-checking program.

Meta's new Community Notes system will be based on algorithms developed by billionaire Elon Musk's social media platform, the company said. Meta will begin testing the crowdsourced program that aims to prevent misinformation on Tuesday,