First-party data
What is first-party data?
First-party data is the information a business collects itself, directly from its own customers and visitors: through its website, shop, orders, email list and conversations. You do not buy it from a broker and it does not come out of anyone else’s database, so it is more accurate than third-party data and stays with you when you change platform or agency. Where it identifies a person, GDPR applies, and non-essential cookies need consent.
Example
An online cosmetics shop has 12,000 visits and 240 orders in a month, at an average of €45 — €10,800 in revenue. Meta’s pixel has recorded 170 of them: some shoppers declined cookies, some ordered on another device, some run an ad blocker. The shop’s own database — orders, subscriber emails, support questions — holds all 240.
The platform cannot see 70 orders, 29% of sales (70 ÷ 240). A shop that judges its campaigns only by the platform’s report risks switching off an ad that is actually selling. So campaign analytics starts from the shop’s own numbers, and the platform’s report becomes the cross-check.
Why it matters for a business
Data from outside sources keeps shrinking. Safari and Firefox restrict third-party cookies by default, a share of visitors refuse consent, and others block advertising scripts altogether. The orders, enquiries and subscribers a business collects itself do not depend on the visitor’s browser, and they do not disappear when you change ad platform or agency.
It also makes the advertising work better. Meta’s Conversions API and Google’s enhanced conversions accept order data from your own site or server, so more sales are matched to the ads that produced them — under the same consent rules.
What to ask
- Where are visitor and order data stored, and can you export them yourself?
- Which outside scripts load on the site, and what do they send away?
- Does anything load before the visitor has given consent?
- Is the source of every enquiry and order recorded, so your reports do not depend on someone else’s platform?
- How long is the data kept, and how can a visitor get a copy or have it erased?
The first-party analytics we build as part of our web software work loads only after consent, runs no third-party scripts and stores no IP addresses, so the data stays in your own site’s database.