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Tracking in 2027 looks nothing like 2020. Third-party cookies are fully deprecated. Client-side JavaScript tracking is legacy technology kept alive only for backwards compatibility. Server-side tracking and first-party data warehouses are standard infrastructure, not competitive advantages. The fundamental shift: you're not just tracking human visitors anymore—you're logging interactions with AI agents shopping, researching, and negotiating on behalf of humans. The End of Cookie-Based Tracking By 2027, cookies as a tracking mechanism are effectively dead: Third-party cookies: Eliminated entirely across all browsers. Chrome finally completed deprecation (delayed multiple times from 2024-2026 timeline). Safari and Firefox blocked them years earlier. First-party cookies: Still functional but unreliable. Safari ITP caps them at 7 days. Privacy-focused browsers block them entirely. Cookie consent rejection rates settled at 60-70% in privacy-conscious markets. localStorage and alternatives: Also subject to ITP restrictions. Any browser-based identifier expires within days or gets blocked by privacy settings. The tracking industry moved...
