Meta is going on trial in a case brought by a coalition of 29 U.S. states accusing the company of designing Facebook and Instagram to keep young users engaged and of misleading consumers about the safety of its platforms.

The states’ allegations, described by multiple outlets as a landmark “youth social media” case, center on claims that Meta’s product design is engineered to drive addiction-like use among children and teens. The proceedings are framed as one of the largest legal challenges yet over social media and youth harm, with the outcome expected to have significant implications for how states pursue platform-related enforcement.

Outlets also highlight the breadth of the trial—covering 29 states—and characterize it as an especially consequential test because it seeks accountability through state-level legal action rather than a single jurisdiction. The reports reference the stakes associated with potential remedies and broader regulatory impact, though the detailed amounts and legal theories are determined by the court process.