First-party and zero-party data from engagement
Zero-party data is information people intentionally share (answers, preferences, forms). First-party data is observed on your properties under your relationship with the user. Engagement formats collect both without third-party cookies.
Definitions that matter in media
Zero-party data: preferences and answers users give on purpose inside a quiz, poll, or form. First-party data: events and identifiers collected on properties you control, with a clear legal basis and consent where required.
Neither depends on third-party cookies. Both can be activated in CRM, CDP, DMP, or DSP workflows when contracts and privacy rules allow.
How engagement creates usable signals
A conversational ad asks something useful: product preference, intent, or contact details. Each interaction creates a declared signal tied to the campaign and, when consented, to an identity the brand or publisher owns.
Collective Audience campaigns are designed to collect, enrich, and activate zero- and first-party audience data in a cookieless, GDPR-oriented model, without third-party intermediaries as the primary identity path. See Advertisers and Publishers.
Privacy and activation
Treat engagement data as personal data when it identifies someone. Document purpose, retention, and activation destinations. Prefer consented collection and clear notices over inferred cross-site profiles.
Cookieless brand strategy and attention measurement sit next to this topic: Cookieless advertising and Attention vs viewability. Privacy policy: /legal/privacy.