Industry Terminology Guide
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Third-Party Cookies

Third-Party Cookies

A "Third-Party Cookie" is a text file placed on a user's browser by a domain other than the web page the user is currently viewing.

Historically used by advertising networks to track user browsing history across multiple sites and display retargeted ads, third-party cookies are now being blocked or completely deprecated by major browsers (Apple ITP, Google Chrome Privacy Sandbox) due to global consumer privacy concerns.

Key Takeaways (30-Second Summary)
  • Cross-Site Tracking: Enables advertising companies to build behavioral profiles of individuals as they browse different platforms.
  • Privacy Regulations: Strict laws (GDPR, CCPA) and platform shifts have forced their systematic elimination.
  • The Cookieless Future: Forces marketers to pivot toward First-Party data collection (direct relationships with consumers) and privacy-centric API measurements.

About "Third-Party Cookies"

This page provides the English definition and usage guide for the professional term "Third-Party Cookies." If you have any suggestions, feedback, or corrections regarding our terminology articles, please feel free to reach out via our contact form.