The tech world is buzzing with a high-stakes trial that could reshape how social media platforms interact with young users. Meta CEO Mark Zuckerberg found himself in the hot seat this week, facing intense questioning about Instagram’s potential impact on teenage mental health.

During the unprecedented legal battle in Los Angeles, Zuckerberg defended his platform against claims that Instagram deliberately addicts and harms children. The lawsuit centers around a 20-year-old woman who alleges that early social media use exacerbated her depression and suicidal thoughts.

Zuckerberg maintained his stance that existing scientific research hasn’t proven social media causes mental health harm. When pressed about platform addiction, he seemingly dodged direct questions, stating he doesn’t believe such claims apply to Instagram.

The trial exposed internal Meta documents revealing complex discussions about user engagement. Plaintiff’s attorney Mark Lanier presented evidence suggesting the company had previously set goals around increasing user time on the platform, contradicting Zuckerberg’s congressional testimony.

Children’s advocacy groups were quick to criticize Zuckerberg’s testimony. Josh Golin from Fairplay argued that the Meta CEO demonstrated he cannot be trusted regarding kids’ online safety, pointing out that Instagram has retained features known to be potentially addictive.

This case is significant because it’s been selected as a “bellwether trial,” meaning its outcome could influence thousands of similar lawsuits against social media companies. The lawsuit challenges tech giants to reckon with their responsibility toward young users’ psychological well-being.

Zuckerberg’s appearance comes after Instagram head Adam Mosseri’s testimony last week, where he denied the possibility of social media clinical addiction and emphasized the company’s commitment to user protection.

As the trial continues, it represents a critical moment in the ongoing conversation about technology, mental health, and corporate accountability in the digital age.