Community Notes

Community Notes
Logo of Community Notes on X
Rating a Community Note on X
Other names	Birdwatch
Original author(s)	Twitter, Inc.
Developer(s)	X Corp.
Initial release	January 25, 2021
Repository	github.com/twitter/communitynotes
Written in	Python
Platform	X
Type	Crowdsourcing Fact-checking Content moderation
License	Apache-2.0 license
Website	communitynotes.x.com

Community Notes, formerly known as Birdwatch, is a feature on X (formerly Twitter) where contributors can add context such as fact-checks under a post, image or video. It is a community-driven content moderation program, intended to provide helpful and informative context, based on a crowd-sourced system. Notes are applied to potentially misleading content by a bridging-based algorithm not based on majority rule, but instead agreement from users on different sides of the political spectrum.

The program launched on Twitter in 2021 and became widespread on X in 2023. Initially shown to U.S. users only, notes were popularized in March 2022 over misinformation in the Russian invasion of Ukraine followed by COVID-19 misinformation in October. Birdwatch was then rebranded to Community Notes and expanded in November 2022. As of November 2023, it had approximately 133,000 contributors; notes reportedly receive tens of millions of views per day, with its goal being to counter propaganda and misinformation. According to investigation and studies, the vast majority of users do not see notes correcting content.^[a] In May 2024, a study of COVID-19 vaccine notes were deemed accurate 97% of the time.^[3][4]

Critics have also highlighted how it has spread disinformation, is vulnerable to manipulation, and has been inconsistent in its application of notes, as well as its efforts in combating of misinformation. Some suggest that structurally the system "lacks critical reflection on the potential for content to harm".^[5][b] Elon Musk, the owner of X, considers the program as a game changer and having considerable potential. However, after a post by Musk received a Community Note, he claimed the program had been manipulated by state actors.^[6]

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