Community Notes, formerly Birdwatch, is a feature on X where contributors can "add context" in order to provide fact-checks, under a post, image or video. The program launched in 2021 with Community Notes becoming widespread on X in 2023. As of November, it has expanded to over 50 countries, approximately 133,000 contributors, and notes are seen tens of millions of times a day by users. It has been described as a community-driven content moderation program, in order to provide helpful and informative context, based on a crowd-sourced fact-checking system. It has been considered as an attempt to debunk propaganda and misinformation and as a replacement for Trust and Safety staff, although former head of the department, Yoel Roth, states this was never the intention.