Mark Zuckerberg testified in the FTC's antitrust trial, defending Facebook's 2012 acquisition of Instagram. The FTC alleges the purchase was anti-competitive, aiming to eliminate a rival. Zuckerberg explained his rationale for the acquisition, citing Instagram's rapid growth and Facebook's own lagging mobile photo app. He also addressed the FTC's argument that Facebook holds a monopoly on friend-based social media, stating that Facebook's use has evolved beyond this core function, becoming a broader 'discovery engine'. Zuckerberg's testimony included internal communications revealing concerns about Facebook's waning cultural relevance.

Prepared by Christopher Adams and reviewed by editorial team.