The prosecutor stood before the federal jury and reduced Meta’s product strategy to four words: hook, hold, harvest and hide. The trial that began Wednesday in federal court is the first major courtroom test of whether social-media companies can be held liable for the way their algorithms treat children, and the states pressing the case opened with a story built on those four verbs.
The lawsuit, brought by a coalition of states, accuses Meta of designing its platforms to exploit the vulnerabilities of teenage brains. The states say the company engineered recommendation systems to maximize the time young users spend on its apps, tuned notifications to pull them back when they try to leave, and harvested their attention with features it knew were harmful. The fourth word, hide, describes what the states say Meta did about its own research: buried the findings that showed the damage.
The case grew out of years of accumulating evidence. Whistleblower disclosures in 2021 showed internal Facebook research on the effects of Instagram on teenagers, including studies that found the platform worsened body-image problems for some young users. A coalition of state attorneys general opened investigations into Meta’s practices, and the lawsuit was filed after years of document requests and depositions. The trial that opened Wednesday is the product of that long preparation.
Meta’s defense is expected to run along familiar lines. The company says its platforms are not addictive by design, that it has invested billions in parental controls and safety tools, and that the responsibility for how children use social media rests with parents and schools. It will argue that the algorithms at issue are the same ones that make its services useful, and that blaming them for teenagers’ struggles confuses correlation with cause. The company has also signaled it will press the free-speech argument: that the government cannot dictate how a private platform orders its content.
The case is one of several fronts in a broader legal assault on social media. Lawsuits against other platforms have made their way through the courts, and state attorneys general have spent years building the evidence base for these claims. What is new about this trial is the focus on recommendation algorithms themselves, the software that decides what a user sees next, as the mechanism of harm. Earlier cases centered on content posted by users; this one centers on the machine that distributes it.
The technical questions could be the hardest part. The states will need to show that specific design choices, not general internet use, caused measurable harm to specific teenagers. That requires expert testimony about how recommendation systems work, about engagement metrics and about the developmental psychology of adolescence, a combination that has never been fully tested in a courtroom at this scale. The states will also have to connect the algorithms to the commercial model behind them, arguing that harvesting attention was not a side effect but the point.
Discovery has already produced some of the most damaging material for Meta. Internal documents, cited in pretrial filings, show the company discussing teen engagement in its own products and debating how far to go in shaping young users’ behavior. The states say those documents prove intent; Meta says they show a company trying to improve its products and protect its users.
The outcome matters beyond the two sides in the room. A verdict against Meta could open the door to damages claims from families across the country, and it would give other states a template for suing platforms over algorithmic harm. A verdict for Meta would reassure the entire social-media industry that its core product design is defensible. Either way, the ruling will shape how the next generation of apps is built, because every platform now designs its recommendation systems with litigation in mind.
For Meta, the stakes are existential in a different way. The company has spent years trying to reposition itself as a responsible steward of its platforms, and its chief executive has testified before Congress about the steps the company takes to protect young users. A loss in this case would undercut that narrative and hand regulators a legal theory they have been looking for. The company’s stock has also become sensitive to regulatory news, and a drawn-out trial keeps the threat hanging over its results.
The trial is expected to run for weeks. The states have promised a parade of witnesses, including former Meta employees who have said they raised concerns internally about teen well-being. Meta has promised a rigorous cross-examination and has said the evidence will show its controls work when parents use them. The four words of the opening will be tested against the thousands of pages of documents that follow.
