Definition
“Cookieless” describes a digital landscape where third-party cookies are gone and first-party cookies are restricted, forcing measurement and targeting onto new methods.
Also called: Cookieless, Cookieless tracking, Cookieless futureFrom customer behaviour to relevant use.
Collection
Data comes from your own relationship: a purchase, visit or response.
Context
Connect data to the right purpose and keep profiles and events consistent.
Relevance
Adapt the experience using relevant signals rather than collecting every possible field.
01Data comes from your own relationship: a purchase, visit or response.
What replaces the cookie
The whole ad ecosystem was built on the third-party cookie: it followed the user across sites and made retargeting, targeting and measurement easy. That era is ending, driven by privacy concerns, legislation and browser changes. “Cookieless” isn't the end of measurement, but a relocation of it.
What steps in instead is server-side tracking, clean first-party data, hashed matching (enhanced conversions, CAPI), consent-based modeling (Consent Mode) and statistical models instead of individual tracking. Brands that build that foundation early measure better than competitors clinging to the old cookie.
Frequently asked questions
Does cookieless mean I can't measure anymore?
No. It means measurement changes method. Server-side tracking, first-party data, hashed matching and consent-based modeling replace the third-party cookie. Brands that adapt early often measure better than those who wait.
What should I do to be ready for a cookieless future?
Build server-side tracking, invest in clean first-party data and an email/SMS list, set up Consent Mode and enhanced conversions/CAPI, and steer decisions by blended numbers (MER) rather than fragile cookie attribution.
From insight to action
See how it applies in practice.
Growth also needed a better purchasing process
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About the author
Nicklas Segatz Mortensen
Growth hacker and fractional CMO with 10+ years' experience and hundreds of millions in managed ad spend behind him. Background from larger Danish and international scale-ups, and from the agency world.
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