Written by
Published Aug 2026
Summary
- Traditional campaign metrics are no longer enough. Marketers need clear evidence that advertising activity is driving commercial growth.
- Effective measurement requires three connected elements: ad engagement data, identity resolution and transaction data that links exposure to purchasing behaviour.
- By connecting engagement to real-world spending, brands can prove marketing effectiveness, optimise future investment and make more confident decisions.
One of the biggest conversations at MAD//Fest this year - alongside the inevitable focus on AI - was measurement.
And it’s easy to see why - as marketing budgets come under greater scrutiny, proving commercial impact has never been more important. Yet despite significant advances in AdTech, answering this question remains one of the industry’s biggest challenges:
Did my marketing activity actually drive business growth?
In a packed (and very warm!) session at MAD//Fest, I was joined on stage with Panid Sarrami Froshani, Marketing Science Lead at Samsung Ads, to discuss how Experian, alongside Samsung Ads as one of our first media partners, is helping marketers to solve this fundamental challenge with evidence - not assumptions.
The measurement gap
The shift to digital has transformed advertising, unlocking more precise targeting, greater addressability and greater relevance at scale.
But measurement hasn’t evolved at the same pace.
While audience planning and activation have become increasingly sophisticated, many advertisers still struggle to understand what happened after an ad was served - and, ultimately, the value it delivered.
As budgets tighten, marketers are now demanding more from the platforms and partners they work with – seeking evidence they can take back to their own businesses:
- Did the campaign generate incremental revenue?
- Which audiences did it influence?
- How did we perform against competitors?
Building the measurement foundation
Answering these questions requires three core components:
Ad Engagement
How was the campaign engaged with?
Identity
Who was behind the device?
Transactions
Who went on to purchase?
The Experian ID Graph sits at the centre as the fundamental enabler. With 85% connectivity across UK households and more than 500 million device IDs, it provides the privacy-safe link between campaign exposure and real-world spending - connecting households that saw an advert with those that later purchased.
Experian’s Transactional Spend Data adds the commercial outcome.
Built from spending across one in ten UK credit and debit accounts and more than 3,500 consumer brands, it’s modelled to represent the UK population and mapped to Mosaic consumer segments to reveal not just what people buy, but who is buying. Importantly, spend is aggregated into groups of at least two households and five individuals, balancing granular insight with consumer privacy.
Together, these capabilities allow advertisers to measure what matters most: whether campaign engagement translated into incremental revenue, customer acquisition and market share growth.
Key takeaway
Robust measurement starts by connecting engagement, identity and transaction data, creating a privacy-safe foundation that links advertising exposure to real commercial outcomes.
From expose to outcomes: A five-step framework
These components are brough together through a five-step measurement framework which maps exposure to outcomes:
1. Validate
Every campaign starts by confirming it has the scale and statistical confidence needed to produce meaningful, reliable insights.
2. Deploy
Audience targeting is established and statistically robust exposed and control groups are created, ensuring fair comparisons and eliminating bias.
3. Connect
Using the Experian Identity Graph, campaign exposure is securely linked to Experian Spend Data through privacy-safe identity resolution, connecting advertising with real purchasing behaviour.
4. Measure
Advertisers receive a clear picture of commercial performance, including incremental revenue, return on ad spend, audience insights showing which Mosaic segments over- or under-indexed, and market share relative to competitors.
5. Optimise
The final step is putting those insights to work - refining audience targeting and media investment based on evidence, not assumptions.
This simple framework unlocks a clear path to action - empowering advertisers with a view of commercial impact – and how to optimise for future success.
The future of measurement is here
For too long, marketers have only had half the story – stuck with outdated media reports that focused on campaign metrics, not campaign outcomes.
Now, we’re closing the loop.
By connecting campaign exposure with real-world spending, advertisers can prove incrementality, understand which audiences are driving growth and optimise future investment based on what actually works.
For marketers, this means greater confidence in every marketing pound invested. For media owners, it’s an opportunity to attract advertisers and deliver value for your clients.
Ultimately, the winners will be the brands that can connect engagement to outcomes – and the platforms and channels that help them do it.
We’ve always known marketing drives growth. Now we can prove it.
The future of measurement isn’t about who saw your campaign. It’s about what they did next.
How we can help
To find out more about how Experian could help your organisation to measure real-world campaign outcomes, reach out to your Experian Account Manager or contact us.