Marketing After Third-Party Cookies: Building First-Party Data
Tracking is harder and privacy expectations are higher. Build a first-party data strategy customers are happy to be part of.
Synctris Team · · 2 min read · International
Digital advertising used to rely heavily on third-party cookies and tracking across websites. Browsers, platforms and privacy regulations have steadily restricted that kind of tracking, and customers increasingly expect control over their data. The brands that adapt best are building their own first-party data — information customers share directly and willingly.
What is first-party data?
First-party data is information you collect directly from your own customers and audience: email sign-ups, purchase history, website behaviour on your own site, survey responses, app activity and customer service conversations. You own it, and when collected with consent, it’s the most reliable data you’ll have.
Why it matters now
- Ad targeting based on cross-site tracking is less precise than it used to be.
- Measurement gaps make it harder to see which ads truly drive sales.
- Privacy laws in many markets require clear consent and responsible data handling.
- Your own audience is an asset no platform can take away.
Give people a reason to share
Customers share data when they get value in return. Useful ideas include:
- Discounts or early access for newsletter subscribers.
- Helpful tools, guides or quizzes.
- Loyalty programmes and member benefits.
- Personalised recommendations based on preferences they choose.
Be clear and respectful
Explain what you collect and why, in plain language. Ask for consent where required, make opting out easy and never collect more than you need. Trust is the foundation of a first-party data strategy.
Connect your data
Bring data from your website, store, email platform and CRM together so you can see each customer’s journey. Even a well-organised CRM or email platform is a strong start.
Put it to work
- Email and messaging: segmented, relevant campaigns based on behaviour.
- Advertising: consented customer lists for lookalike audiences and exclusions.
- Server-side tracking: tools like the Meta Conversions API and enhanced conversions help ad platforms measure results more reliably.
- Personalisation: tailored content and recommendations on your site.
Start with the basics
Audit what data you already collect, fix consent and tracking, set up a simple email capture and connect your key tools. Then build from there.
We help brands build privacy-conscious data and measurement foundations. Explore our data services.
