Tracker & Tracking Fundamentals

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

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