Second-Party Data
Second-party data is another organization's first-party data, shared or sold directly through a partnership "” effectively someone else's owned customer data used with permission.
Key takeaways
- Second-party data is another company's first-party data, shared directly.
- It's higher quality and more transparent than third-party data.
- Partnerships and clean rooms are the usual mechanisms for sharing it.
- It gained importance as third-party data lost reliability.
First-party data, shared
Second-party data isn't a special kind of data "” it's first-party data with a partner. A retailer might share its purchase data with a complementary brand, or a publisher might share audience data with an advertiser. Because it comes from a known source with a direct user relationship, it's more transparent and reliable than aggregated third-party data.
Partnerships and clean rooms
Second-party arrangements are increasingly executed through data clean rooms, which let two parties match and analyze their data without exposing raw records. This makes privacy-safe second-party collaboration a core post-cookie tactic, especially for retail media and CTV.
| What it is | A partner's first-party data |
|---|---|
| Quality | High "” known, direct source |
| Mechanism | Partnerships, clean rooms |
| Versus 3P | More transparent and reliable |
Frequently asked questions
What is second-party data?
It's another organization's first-party data shared directly through a partnership "” for example, a publisher sharing audience data with an advertiser.
How is second-party data shared safely?
Increasingly through data clean rooms, which let two parties match and analyze their data without either exposing raw user-level records.