X (formerly Twitter) launched its “Community Notes” program in 2021 to combat misinformation by allowing users to add contextual notes on posts that might be deceptive or lead to misinterpretation. An example would be users labeling an AI-generated video as such, so that other users would not be tricked into believing the event in the video actually occurred. Community notes are rated by the decentralized social media community to determine their usefulness. Only the notes determined useful by raters are shown on the post. X’s Community Notes later inspired other platforms to launch similar programs.