What Is Cookieless Tracking?

Cookieless tracking refers to measurement methods that don't rely on cookies to identify or follow a visitor, including server-side identifiers, aggregated modeling, and Google's cookieless Consent Mode state. It's used both to comply with consent restrictions and to maintain measurement as browsers phase out third-party cookies.

Cookieless tracking isn’t one technique, it’s a category that includes everything from privacy-preserving aggregate reporting to more aggressive methods like Fingerprinting (Device/Browser), which raise their own compliance concerns. When a visitor declines consent, Google Consent Mode (v2)‘s cookieless state is meant to fall back to genuinely limited, aggregated signals rather than continuing to identify individuals through another method. Whether an implementation actually does that, versus quietly using fingerprinting anyway, is worth verifying rather than assuming.