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Beginner course

Tracker & Tracking Fundamentals

Cookies, pixels, fingerprints and CNAME cloaking, without the jargon.

24 min total 5 lessons

Learn what trackers actually do, how they identify you across sites and which defences hold up in 2026.

Lessons

  1. 1What is a tracker?From pixels to SDKs. 4 min
  2. 2Third-party cookiesWhy every browser is killing them. 5 min
  3. 3Browser fingerprintingIdentification without cookies. 6 min
  4. 4CNAME cloakingWhen trackers hide behind first-party domains. 5 min
  5. 5Where the data goesThe downstream market for tracking data. 4 min

Ready to start?

Lesson 1 takes 4 minutes.

Start lesson 1