Meta & Children's Online SafetyMeta terminology
U13
Under-13
Users below the minimum age of 13 set by Meta's terms of service and by COPPA. "U13" denotes both the age cohort and the underage accounts Meta's own documents discuss detecting, removing, or building products for.
Sources
Internal documentBest Practices for Sensitive Research and A/C Privilege
Plaintiffs' filingComplaint for Injunctive and Other Relief, California v. Meta