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Meta Platforms is defending itself in a major federal civil trial in California as 29 states accuse the company of deliberately designing Facebook and Instagram to keep children and teenagers hooked. The case could have major consequences for Meta, social media companies and the future of online child safety.

Meta Platforms, the parent company of Facebook and Instagram, is facing one of its most significant legal challenges yet as it defends itself in a federal civil trial in the U.S. District Court for the Northern District of California.

The case centers on allegations that Meta deliberately designed its social media platforms to encourage compulsive use among young people while failing to adequately protect children from harmful content and privacy risks.

Meta denies the allegations and is arguing that it has made substantial investments in safety features and protections for younger users.

The trial began in federal court in Oakland on August 18, 2026, and is expected to last approximately six weeks.

What Is the Meta Federal Trial About?

The lawsuit stems from claims brought by a coalition of state attorneys general against Meta.

California, Colorado, Kentucky and New Jersey are among the states taking part in the current trial, while additional states are expected to pursue their own proceedings related to the broader allegations.

At the heart of the case is a simple but consequential question:

Did Meta knowingly design Facebook and Instagram in ways that encouraged children to spend excessive amounts of time on the platforms?

The states argue that the answer is yes.

According to prosecutors, Meta used knowledge about adolescent psychology and platform engagement to create features designed to maximize the amount of time young users spent on Facebook and Instagram.

The allegations include concerns about features such as:

• Infinite scrolling
• Algorithmically recommended content
• Notifications
• Likes and social feedback
• Personalized recommendations
• Age verification
• Protection of children from harmful content

The states also allege that Meta improperly collected information from children under 13 without appropriate parental consent and misled the public about the safety of its platforms.

Meta’s Defense

Meta strongly disputes the allegations.

The company’s lawyers have argued that the states have not established that Facebook and Instagram were intentionally designed to harm children.

Meta has also pointed to the safety measures it has implemented for younger users and argued that social media use cannot simply be blamed for the wide range of mental-health challenges facing adolescents.

The company has emphasized that children sometimes misrepresent their ages when creating online accounts, making age verification particularly difficult.

Meta’s defense also challenges the connection between social media use and specific mental-health outcomes among teenagers.

In other words, Meta’s position is not simply that it has attempted to improve safety. The company is also challenging the plaintiffs’ underlying claims about causation and responsibility.

Former Meta Engineer Testifies

One of the most closely watched witnesses so far has been Arturo Béjar, a former Meta engineering director and contractor.

Béjar testified for the states and criticized Meta’s approach to child safety.

According to Reuters, Béjar told the court that CEO Mark Zuckerberg’s focus on growth and user engagement influenced the company’s culture and that proposed safety improvements were not always implemented.

His testimony is significant because the states are attempting to demonstrate that Meta knew about problems affecting young users but failed to respond adequately.

Meta, however, maintains that it has a large safety organization and has implemented numerous protections for teenagers and children.

Could Meta Face $1 Trillion or More in Damages?

One of the most eye-catching aspects of the lawsuit is the potential financial exposure.

The states have argued that damages could potentially reach $1.4 trillion under certain calculations.

That figure has generated enormous attention because it would represent an extraordinary financial penalty for any company.

However, the potential maximum should not be confused with an expected judgment.

Legal experts have indicated that actually imposing damages anywhere near $1.4 trillion would be highly unusual. The ultimate financial consequences, if Meta is found liable, would depend on the court’s findings and the applicable laws.

The case could also result in something potentially more important than money: changes to how Meta operates Facebook and Instagram.

Could the Court Force Meta to Change Facebook and Instagram?

The states are seeking more than financial damages.

They also want restrictions or changes involving the way Meta’s platforms operate.

Potential changes could affect features and practices involving:

• Age verification
• Teen accounts
• Algorithmic recommendations
• Infinite scrolling
• Notifications
• Data collection
• Default safety settings
• How young users interact with content

Such changes could affect millions of Facebook and Instagram users.

They could also influence how other social media companies design their platforms.

Why This Trial Matters

The Meta trial is part of a much broader legal battle over the relationship between social media and children’s mental health.

Meta is facing lawsuits from states, parents, school districts and individuals who allege that its products contribute to harmful or addictive behavior among young users.

The company has also faced significant legal setbacks in other cases.

Earlier in 2026, a New Mexico case resulted in a judgment approaching $1 billion and required Meta to make additional safety changes. A separate Los Angeles case resulted in a jury finding Meta and YouTube liable in a social-media addiction lawsuit.

Those cases could increase the pressure on Meta as the federal proceedings continue.

The Section 230 Question

Another important issue surrounding social media litigation is Section 230 of the Communications Decency Act.

Section 230 generally provides online platforms with protection from liability for content created by their users.

But plaintiffs in social-media cases have increasingly argued that their claims concern the platforms’ own product design and business practices rather than simply user-generated content.

That distinction could become increasingly important as courts determine whether traditional internet protections apply to claims involving algorithms, platform design and alleged addictive features.

A Rare Federal Trial

The proceeding also has an unusual feature.

U.S. District Judge Yvonne Gonzalez Rogers selected an eight-person advisory jury consisting of five women and three men.

Unlike a traditional jury, the advisory jury’s decision is not binding. Instead, it will provide guidance to the judge, who will ultimately decide the case.

That makes the trial particularly unusual for such a high-profile technology case.

What Happens Next?

The trial is expected to continue for approximately six weeks.

Among the witnesses expected to attract significant attention are Meta executives and other current and former employees.

Meta CEO Mark Zuckerberg is expected to testify, potentially giving the court an inside look at how the company has approached youth safety, user engagement and product development.

The eventual ruling could have implications far beyond Meta.

If the states succeed, other governments and plaintiffs could use the decision as support for similar claims against social media companies.

If Meta prevails, the decision could strengthen the company’s position in the numerous lawsuits still pending around the country.

The Bigger Battle Over Social Media

The Meta case represents a fundamental debate over how technology companies should be held accountable for the way their products affect children.

Social media platforms have become a major part of everyday life for millions of teenagers. At the same time, concerns about excessive use, online harassment, harmful content, privacy and mental health have intensified.

The legal question is whether those concerns are primarily the responsibility of users and parents—or whether technology companies should be legally responsible for designing products that may encourage excessive engagement.

Meta’s federal trial could help define where that line is drawn.

Bottom Line

Meta is defending itself in one of the most consequential social media trials in the United States.

The states accuse the company of deliberately designing Facebook and Instagram to keep young users engaged, failing to adequately protect children and misleading the public about platform safety.

Meta rejects those allegations and says it has invested heavily in protecting younger users while disputing claims that its platforms are responsible for the alleged harms.

With potentially enormous financial consequences and the possibility of court-ordered changes to Facebook and Instagram, the case could become a landmark moment for social media regulation, child safety and technology law.

Whatever the final outcome, the trial is likely to influence how Meta—and potentially the entire social media industry—designs products for young users in the years ahead.

Frequently Asked Questions

Why is Meta on trial in federal court?
Meta is facing allegations from a coalition of states that it deliberately designed Facebook and Instagram to encourage compulsive use among children and teenagers and failed to adequately protect young users.

Where is the Meta trial taking place?
The federal trial is taking place in Oakland, California, in the U.S. District Court for the Northern District of California.

How many states are involved in the case?
The broader lawsuit involves 29 states, with California, Colorado, Kentucky and New Jersey leading the current federal trial.

How much could Meta have to pay?
The states have suggested potential damages could reach approximately $1.4 trillion, although that is a maximum theoretical exposure rather than an indication of what Meta would necessarily have to pay.

Will Mark Zuckerberg testify?
Zuckerberg is expected to testify during the trial, according to reporting on the proceedings.

Could the trial change Facebook and Instagram?
Yes. The states are seeking remedies that could require Meta to change certain platform practices, potentially affecting features such as age verification, recommendations, infinite scrolling and protections for younger users.

Why is this case important?
The outcome could establish an important legal precedent for how social media companies are held responsible for platform design and alleged harms to children.