First-Party Data
What This Page Answers
First-party data is information a business collects directly from customers, leads, site visitors, app users, CRM records, purchases, or subscriptions. It is the foundation for better targeting, exclusions, conversion feedback, and measurement resilience.
Common First-Party Data Sources
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Customer lists
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CRM lifecycle stages
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Email and phone data where permitted
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Purchase history
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Subscription and retention data
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App events
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Website events
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Offline sales
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Product catalog behavior
How Paid Media Uses It
First-party data can support:
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Custom audiences
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Lookalikes
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Exclusions
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Offline conversions
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Enhanced conversions
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Conversions API and Events API
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LTV analysis
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New customer acquisition reporting
Use with Offline Conversions, Google Tag and Enhanced Conversions, and Meta Pixel and Conversions API.
Practical Rule
First-party data is only valuable if it is accurate, permissioned, fresh, and connected to business quality.