General Terms
First-Party Data
Data collected directly from customer interactions and owned channels.
Definition
First-party data is information collected directly from customer interactions with a company's owned channels and touchpoints. This includes website behavior, purchase history, CRM data, app usage, survey responses, and other direct customer interactions, making it highly valuable for personalization and targeting.
Examples
Website browsing behavior and conversion data
Customer purchase history and preferences
Email engagement and response data
Mobile app usage patterns
Frequently asked questions
Common questions about First-Party Data, answered.
What is first-party data?
First-party data is information a company collects directly from its own audience and interactions — website and app behavior, purchase history, CRM and account data, email engagement, and information customers provide. Because it's gathered first-hand with a direct relationship, it's accurate, relevant, owned by you, and (when properly consented) the most durable and trustworthy data source for marketing.
Why is first-party data increasingly important?
Because the alternatives are disappearing. Third-party cookies and cross-site tracking are being deprecated and restricted by browsers and privacy regulation, eroding the third-party data that once powered targeting and measurement. First-party data — collected with consent through your own relationships — is durable, compliant, and yours, making it the foundation of post-cookie marketing for targeting, personalization, custom audiences, and measurement.
How is first-party data used in advertising?
To build custom audiences for retargeting and customer marketing, seed lookalike audiences to find new prospects, personalize messaging and offers, improve measurement and attribution (e.g. server-side conversions), and train platform algorithms with high-quality conversion signals. As signal loss degrades third-party tracking, feeding platforms clean first-party data has become essential to keep targeting and optimization effective.
What's the difference between first-, second-, and third-party data?
First-party data is collected directly from your own audience (yours, accurate, consented). Second-party data is another company's first-party data shared or sold directly to you (essentially someone else's first-party data via partnership). Third-party data is aggregated from many sources by data brokers and sold broadly — historically used for targeting but increasingly restricted and less reliable. The reliability and durability run highest for first-party, lowest for third-party.
How do I collect more first-party data?
By giving people reasons to share and engage: accounts and logins, email/SMS sign-ups with clear value (content, offers, updates), loyalty programs, interactive tools and quizzes, gated content, and great experiences that encourage return visits — all with transparent consent. Investing in owned channels and direct relationships builds the first-party data asset, while clean collection and consent management keep it compliant and usable.
