Mark Zuckerberg testified in court regarding accusations that Instagram and YouTube harm children’s mental health, specifically citing the case of Kaley, who alleges the platforms were intentionally designed to be addictive. The testimony centered on Meta’s knowledge of potential risks, its use of features like Reels to compete with TikTok, and the prevalence of beauty filters that may negatively impact teens’ self-perception. Zuckerberg defended Meta’s approach, arguing for a product with long-term appeal and highlighting the difficulty in accurately verifying users’ ages. Internal documents revealed strategies to increase time spent on the platform and a past directive to attract young users. Despite acknowledging concerns raised by a Meta employee, Zuckerberg maintained that teens represent a small portion of the company’s revenue. The case’s outcome could significantly impact numerous other lawsuits alleging harm caused by social media.