Meta will start testing its Community Notes model, with which it's replacing human fact checkers, on Facebook, Instagram and Threads in the US on March 18. Notes won't appear publicly on posts right away.

Meta will begin testing its X-style Community Notes starting March 18th. The feature will roll out on Facebook, Instagram, and Threads in the US – but Meta won’t publicly publish the notes to start as it tests the Community Notes writing and rating system.

Meta will use X's open-source algorithm as the foundation for its rating system and will gradually roll out the feature after testing, with plans for future global expansion. The focus is on providing helpful context without impacting content distribution, and emphasizing that the system will prioritize agreement between those who usually disagree.