Twitter has a secret program that prioritizes well-known and popular Twitter users, to protect them from abuse or harassment.

According to a recent report from Bloomberg, Project Guardian covers a list of thousands of high-profile accounts, including politicians, musicians, journalists, professional athletes and more. Twitter prioritizes flags of abuse reported on these accounts, reviewing them ahead of other flagged reports in its content moderation queue.

Twitter's content moderation is done with the help of any user who can report Tweets or comments that they believe violate the platform's policies. Twitter also relies on machine learning to flag content and a dedicated team of content moderators who decide a Tweet's fate based on the platform's policies.

Bloomberg noted that accounts that are part of Project Guardian don’t have any special rules, but that the program is instead designed to spot and stop “viral nightmares” before they happen. What’s more, most users who are part of Project Guardian don’t even know they’re getting special attention.