Twitter's Birdwatch site allows approved users to fact-check tweets, and any user can view those fact-checks. Westend61/Getty Images Twitter's Birdwatch feature lets users flag tweets they believe are misleading or need additional context. The Birdwatch feature is in pilot mode and is only available to select users in the US. Birdwatch is Twitter's latest method of cracking down on the rapid spread of misinformation on the platform.