Alex Sims
Professor in the Department of Commercial Law at the University of Auckland Business School and technology commentator, with expertise in blockchain, copyright and consumer law, who provides expert analysis on cookies and tracking pixels.
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Mar 18, 2026 • 20min
Tech: What's a tracking pixel, who's following me and why?
Alex Sims, commercial law professor and tech commentator, explains cookies and tracking pixels and how they differ. He outlines what pixels can collect and why platforms like TikTok and organisations use them. He also covers legal, ethical and transparency concerns, who in New Zealand uses pixels, and practical steps people can take to reduce tracking.
