Insights into first-party data strategies and how AMC replaces third-party cookies

For years, third-party cookies were the backbone of digital advertising. They quietly followed people around the internet, stitching together data points that made retargeting and measurement seem easy. But those days are over.

Browsers are killing cookies, privacy regulations are tightening, and the old ways of tracking have more or less collapsed, piling the pressure on brands that relied heavily on third-party data, and making performance marketers work harder than ever just to stand still.

Enter Amazon Marketing Cloud (AMC), Amazon’s answer to life after cookies. It takes the vast amount of first-party data that Amazon already has and gives advertisers a privacy-safe way to analyse it. Done well, it doesn’t just replace the cookie era. It actually outperforms it.

Why is first-party data now so important?

First-party data isn’t new. Brands have been collecting their own customer information for years. The difference now is that it’s become the only data that truly matters.

Without cookies, the only reliable insights are the ones you build from direct relationships, and this is where Amazon holds a unique edge. Millions of people shop, search, watch, and review products across Amazon’s ecosystem every single day. Each of those actions leaves behind a trail of intent-rich signals.

Inside AMC, those signals can be connected and analysed in a way that shows the real customer journey, from seeing an ad to actually making a purchase. You’re no longer guessing or relying on proxy metrics; you can finally see what’s really working.

Does Amazon AMC provide advertising insight?

Think of AMC as Amazon’s clean room; a secure, privacy-first environment that lets you explore what’s really happening with your campaigns.

Instead of tracking random users across websites, you’re analysing verified shopping behaviour within Amazon’s own walls. It’s a different mindset entirely. You’re not spying and summarising; you’re studying intent.

For example, you can see how people exposed to a Streaming TV ad later clicked on Sponsored Products, or how a Display impression influenced a Subscribe & Save enrolment weeks later. It’s the kind of insight third-party cookies could only dream of offering.

The level of detail is astonishing. But most importantly, it’s accurate.

Can AMC help to build smarter strategies?

The beauty of AMC is that it’s not just a reporting tool; it’s a planning engine. When you use it properly, it can reshape how you segment audiences, craft messages, and allocate budget.

Here are a few practical ways brands are already using it…

• Refining audiences

Instead of broad retargeting, you can identify the exact types of customers who convert best, and then model your lookalikes around them, not a generic pool

• Mapping real paths to purchase

With AMC, you can see how shoppers move between ad types, devices, and touchpoints. It helps you pinpoint where people stall, and where you can accelerate them towards a sale

• Measuring incrementality

Cookies never provided any information on which sales you truly influenced. AMC does. You can finally separate what would’ve happened anyway from what your ads actually drove.

• Optimising across channels

AMC insights feed directly into Amazon DSP, Sponsored Ads, and even external campaigns, providing a joined-up view of performance rather than disconnected reports. It’s a shift from marketing by instinct to marketing by evidence.

How can you make the most of Amazon AMC?

Let’s be honest, moving to first-party strategies takes a bit of a mindset shift. Cookie-era advertising was often lazy by design: broad targeting, simple retargeting, endless remarketing loops. It worked until it didn’t.

AMC demands more thought. You’ll need people who can ask good questions of the data,  analysts who can model, marketers who understand how creative plays into conversion, and teams willing to collaborate rather than work in silos.

Brands that win here don’t treat AMC as just another reporting platform. They treat it like an operating system for how they make decisions – an internal source of truth that informs every media choice.

How does AMC prioritise privacy?

Amazon AMC is designed to prioritise online privacy, working to provide a closed, consent-driven system where data is kept anonymous and secure.

Gone are the days of dealing with disappearing tracking pixels or new browser restrictions. Your strategy becomes future-proof, not just reactive to whatever change Google or Apple announces next.

Instead of worrying about what data you’re losing, you start focusing on how to use the data you already have more intelligently.

The end of third-party cookies isn’t the end of digital advertising. It’s just the end of the lazy version of it.

For brands willing to lean into first-party insight, AMC represents a step forward — more precision, more relevance, and more confidence in every pound you spend. So, the real question isn’t how will you cope without cookies? It’s how will you use AMC to build a smarter, stronger strategy that lasts long after they’re gone?