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Meta secures expert witness in South Korean digital advertising privacy case

By Jenny Lee ( October 31, 2025, 07:30 GMT | Insight) -- Meta Platforms devoted much of its second appellate hearing to convincing a South Korean court that expert testimony is crucial to understanding how digital advertising actually works, an argument the panel partially accepted while signaling the case could stretch well into 2026. The hearing at the Seoul High Court marked the second oral argument in Meta's appeal of a lower court ruling that sided with the Personal Information Protection Commission, which found that the company had failed to secure users’ consent before collecting and using their behavioral data from third-party websites and apps for targeted ads.Meta Platforms devoted much of its second appellate hearing Thursday to convincing a South Korean court that expert testimony is crucial to understanding how digital advertising actually works, an argument the panel partially accepted while signaling the case could stretch well into 2026....

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