At A Glance
As commerce media reshapes digital advertising, the line between first- and third-party onboarding is blurring. Whether you’re activating data for your own campaigns or helping partners reach new audiences, how that data is used matters more than ever. This article explores what happens when first-party data becomes third-party, how the new environment changes activation, and how Experian helps brands navigate it all with privacy-led identity, efficient modeling, and seamless ecosystem connections.In this article…
In the past, first-party onboarding focused on activating a brand’s own customer data, while third-party onboarding allowed advertisers to tap into external audiences. But the rise of commerce media networks (CMNs) — which now influence over 14% of all digital ad spend — has blurred those once-clear lines.
CMNs, retail media ecosystems, and brand partnerships are reshaping how data is shared, accessed, and activated. Today, the question isn’t just who owns the data but why it’s being used. Whether to strengthen customer relationships or create new revenue opportunities, intent now shapes how data must be governed, shared, and measured.
For brands with strong first-party data, this shift creates opportunities to deliver more personalized, privacy-safe campaigns to their own audiences and to extend that data’s value by enabling partners to reach new segments.
In this connected ecosystem, data onboarding enables brands to activate, scale, and monetize their data responsibly, turning first-party insights into privacy-led growth opportunities. Trusted onboarding partners like Experian can help marketers activate first-party audiences with accuracy while scaling and connecting those audiences across the ecosystem for compliant, revenue-generating collaboration.
What is data onboarding?
Data onboarding moves offline consumer data — like CRM records, loyalty details, or transaction histories — into digital environments for activation and measurement. It connects real-world insight with digital engagement across display, social, search, connected TV (CTV), and commerce media. Data onboarding is now a strategic pillar for marketers managing signal loss, disconnected data, and rising privacy expectations.
The approach you take and who owns the data determine what kind of onboarding it is:
- First-party onboarding: A brand activates its own customer data across digital platforms.
- Third-party onboarding: A brand enables others to use its data, often monetizing it — common in CMNs or commerce media ecosystems.
Experian helps marketers succeed in both models. With AI-driven identity resolution, persistent identifiers, and privacy-first infrastructure, we make onboarding accurate, compliant, and scalable, regardless of who owns the data.
Why do marketers need data onboarding?
Even the most data-rich brands often have a limited view and reach when it comes to their audiences. They’re confined to the data they collect directly and to the owned channels they use to engage those people. Customer files may reveal who’s already in the ecosystem, but not always where those people spend time, how they behave across channels, or why they make certain decisions.
Onboarding bridges that gap. It transforms offline data into digital activation power, allowing marketers to connect insight with action. Experian makes this possible at scale with trusted identity resolution, data ranked #1 in accuracy by Truthset, audience modeling expertise, and seamless data integration across platforms, helping marketers activate confidently and compliantly.
With Experian’s onboarding solutions, marketers can achieve:
- Unified customer identity across devices, channels, and touchpoints.
- Cross-channel personalization with consistent, relevant messaging wherever customers engage.
- Scaled, privacy-compliant reach beyond owned channels without sacrificing control or consent.
- Better insights and audience creation by blending first-party and Experian Marketing Data for a deeper understanding.
- Cross-channel activation with deep integrations into the advertising ecosystem.
Core steps in the onboarding process
While onboarding can vary across use cases, the core process remains consistent. Experian’s AI-enhanced identity infrastructure streamlines every stage of data migration and activation, making each step safer and faster:
- Data ingestion: Transfer the data into the onboarding environment using privacy-safe encryption and consented parameters to protect sensitive information responsibly from the start.
- Transformation: Cleanse, standardize, and format records to align with digital identifiers. This eliminates inconsistencies and makes every record easier to recognize and activate later.
- Identity resolution: Link offline identifiers (names, emails, addresses) to hashed digital equivalents like mobile advertising IDs (MAIDs), CTV IDs, and universal IDs via Experian’s Offline and Digital Graphs. Identity resolution connects customers to their digital presence without exposing personal information.
- Identity matching: Match hashed emails, MAIDs, and device-graph identifiers to activation partners for each audience across demand-side platforms (DSPs), social, and CTV platforms. This expands your audience reach while maintaining accuracy and privacy.
- Activation: Deliver privacy-safe audiences to DSPs, social, search, or CMN shelves from third-party data providers (not the CMN’s own data) — or directly to an advertiser’s seat for immediate activation. You’ll turn insights into action and be able to reach the right people with relevant, compliant messaging.
Behind this flow is Experian’s identity graph, which links 250 million U.S. individuals, 900 million hashed emails, and 4.2 billion digital identifiers refreshed weekly. It’s the foundation that keeps onboarding accurate as the signal landscape shifts.
First-party vs. third-party onboarding
Every digital marketing data point has a story, but whose story it tells depends on who’s using it. That distinction defines the difference between first-party and third-party onboarding. Both are essential to modern marketing, but they carry different expectations for control, consent, and accountability.
First-party onboarding: Activate your own data safely and strategically
First-party onboarding starts with the data a brand earns directly from its own customers through trusted relationships. This data belongs to the brand, as customers have given consent, and the brand has the responsibility (and opportunity) to use it well.
That data might include:
- CRM records
- Loyalty-program data
- Purchase or transaction histories
- Website or app interactions
- Email subscribers or reward members
How first-party onboarding works in practice
The onboarding process connects this offline data to digital identity so marketers can reach their existing customers across channels.
For example, a credit card company might take its CRM file of cardholders, hash the email addresses, and upload that file to a DSP via Experian’s Audience Engine. Experian’s identity graph resolves those emails to privacy-safe digital identifiers like MAIDs, CTV IDs, or universal IDs. The result is a ready-to-activate audience that can be reached on CTV, social, and display without exposing raw personally identifiable information (PII).
Why control matters in first-party onboarding
The advantage of first-party onboarding is control; the brand decides what to share and how to use it. It’s a powerful way to:
- Personalize messages for known customers
- Re-engage lapsed buyers or loyalty members
- Suppress existing customers from prospecting campaigns
- Measure performance with closed-loop attribution
Doing first-party onboarding responsibly
That control comes with responsibility. Even consented customer data that has been consented to can pose risks if handled carelessly or shared with unverified partners. Experian’s First-Party Onboarding sits on a privacy-first identity foundation, governed by decades of compliance leadership under laws like the Gramm-Leach-Bliley Act (GLBA) and Fair Credit Reporting Act (FCRA).
We connect data and identity responsibly, so marketers can activate with confidence while protecting consumers.
Why first-party onboarding matters
First-party onboarding is the cornerstone of responsible marketing. It allows brands to deepen relationships they already have, using data that customers have freely shared. And with Experian’s secure First-Party Onboarding, that data stays encrypted, compliant, and under the brand’s control from start to finish.
Third-party onboarding: Share and monetize data responsibly
Third-party onboarding begins when a brand allows someone else to use its data. It’s how data providers, publishers, and especially CMNs monetize their audiences — turning first-party customer insights into addressable, privacy-safe segments that advertisers can buy and activate across digital channels.
How third-party onboarding works in practice
Think of it as data collaboration at scale. Let’s say a retailer collects first-party shopper data like product purchases, loyalty card usage, and store visits. Then, they partner with Experian to make that audience available to outside advertisers, such as a consumer packaged goods (CPG) brand.
Through Experian Third-Party Onboarding, those audiences are resolved, privacy-protected, and distributed to integrated destinations such as The Trade Desk, Magnite, or NBCUniversal for activation.
- To the retailer, it’s their first-party data.
- To the CPG, it’s third-party data they can use for targeted campaigns.
- To Experian, it’s an opportunity to ensure the entire exchange is accurate and compliant.
Why scale matters in third-party onboarding
The benefit of third-party onboarding is scale. It enables data owners to monetize their insights, while giving advertisers access to richer audiences they couldn’t build on their own. It’s the engine behind CMNs, commerce media, and the growing data-sharing economy.
With a partner like Experian, that scale becomes even more powerful. Our advanced modeling and identity solutions help brands expand their audiences responsibly using lookalike and predictive modeling to identify high-value segments, increase reach, and maximize performance across every activation channel.
The responsibilities of data sharing in third-party onboarding
As data ecosystems grow, so does the opportunity to collaborate responsibly. Once data leaves its original owner’s ecosystem:
- Consent obligations become more complex.
- Control over downstream usage can blur.
- Regulatory oversight increases, especially around transparency and consumer rights.
With the right governance in place, these responsibilities can help strengthen partnerships, protect consumers, and create a foundation for sustainable growth.
Experian’s ethical enablement role in third-party onboarding
Experian’s enablement role is both technical and ethical. Our deep expertise enables us to partner with brands and support their monetization efforts, helping them derive new value from their data while maintaining the highest standards of privacy and compliance. Meanwhile, our infrastructure ensures third-party data onboarding happens securely and transparently:
- Identity resolution expands reach without overexposing identifiers.
- Data verification and governance ensure partners meet strict privacy standards.
- Revenue-share structures maintain fairness without hidden costs.
- Cross-channel integrations enable you to onboard your data once and activate it everywhere (programmatic, CTV, or social) through Experian’s 30+ direct and 200+ indirect destination partnerships.
Why third-party onboarding matters
Third-party onboarding is the foundation of modern data collaboration. When done through Experian, it becomes a trusted extension of your brand’s identity governed by the same privacy, consent, and accuracy standards that strengthen your first-party ecosystem. We help brands uncover new opportunities for growth, partnership, and responsible innovation.
When first-party onboarding turns into third-party onboarding
When data ownership shifts, privacy expectations change, and the rules of onboarding start to look a little different. This stage can feel complex, but with the right approach, the crossover becomes clear. It’s a natural evolution that helps brands connect data more effectively and collaborate confidently.
Here’s what that can look like in practice. A retailer uses its own first-party data to engage loyal shoppers through its website, app, or email program. The data is secure, consented, and fully under the retailer’s control. Then comes collaboration. The retailer decides to partner with a brand, like a CPG company, to reach those same shoppers across connected TV or the open web.
In that moment, the retailer’s first-party data becomes the CPG’s third-party data. Ownership doesn’t really change, but accountability does, along with new privacy and compliance considerations.
This “crossover moment,” when first-party onboarding turns into third-party activation, is a small shift with big potential that can lead to new reach, deepen collaboration, and strengthen customer connections across the marketing ecosystem when managed responsibly.
Why clarity matters in the crossover between first- and third-party onboarding
When data starts flowing beyond owned channels, questions naturally come up. Marketers want to know things like:
- Who “owns” the audience once it’s shared with a partner or DSP?
- Whose privacy notice applies — the retailer’s, the brand’s, or both?
- How do we keep match accuracy without overexposing PII?
- Who’s responsible for opt-outs and suppression compliance downstream?
These are the right questions to be asking, and they’re signs of a mature, data-driven strategy. Asking them is what helps brands strengthen governance, build trust, and get more value from collaboration. With the right framework in place, what could feel complicated becomes clear, opening the door to more confident growth across CMNs and other shared-data environments.
How Experian brings clarity and control to the first- and third-party onboarding crossover
As a neutral, privacy-first partner, we provide the infrastructure that keeps data secure, compliant, and meaningful wherever it flows. Our onboarding solutions help both sides of the partnership — retailers and advertisers — maintain trust through:
- Clear ownership and consent management: Experian enforces data-handling rules that preserve each party’s control. Every record is matched and activated in accordance with strict consent parameters and Global Data Principles that exceed industry standards.
- Accurate, privacy-safe identity resolution: Our Offline and Digital Graphs connect people to their devices, households, and behaviors using hashed identifiers, ensuring match precision while protecting individuals.
- AI-powered contextual intelligence: Experian’s AI models analyze real-world behavior and contextual signals to enhance match quality and extend reach without reliance on cookies. For CMNs, that means better off-site activation, targeting the right shoppers in the right environments while maintaining compliance.
- Trusted integrations and transparent reporting: With direct integrations into 30+ programmatic and TV destinations, Experian delivers consistent match rates and unified measurement through solutions like Activity Feed and Experian Outcomes.
This is how Experian transforms complex data challenges into seamless, scalable collaborations that give marketers the confidence to expand responsibly into commerce media and commerce ecosystems.
The new standard of responsible AI and commerce media
Commerce media represents the future of audience activation, but only if the transition is managed responsibly. As the lines blur between data ownership and activation rights, Experian’s AI-driven, privacy-first identity framework acts as the connective tissue between retailers, brands, and platforms.
We help CMNs:
- Enrich shopper data with Experian Marketing Attributes for deeper insights.
- Extend addressability off-site using privacy-safe identity resolution.
- Optimize activation through real-time, contextually aware audience expansion.
- Measure results transparently through privacy-compliant feedback loops.
In short, we ensure that when your first-party onboarding becomes third-party activation, trust and performance stay intact.
Why choose Experian’s onboarding solutions?
Many view onboarding as a data transfer, but we treat it as a trust process where accuracy, privacy, and performance align. Here’s why marketers choose us:
1. Unmatched data and identity foundation
When brands struggle with incomplete or siloed customer data, Experian’s unified foundation connects fragmented records into a single, accurate identity.
Our Offline and Digital Graphs link households, individuals, and devices with persistent accuracy. Updated weekly and built on decades of historical data, our graphs maintain 97% household coverage across the U.S., even through signal loss.
2. Privacy-first and compliance-led
Given tightening regulations and growing consumer expectations, privacy compliance is essential. With decades as a regulated data steward, we apply the same rigorous controls from our financial operations to marketing data.
Every data partner is verified for transparency and compliance with consent requirements, and all consumer data is governed by Experian’s Global Data Principles, which exceed industry standards. We help brands meet their privacy and consent obligations confidently while maintaining the data integrity that drives results.
3. Real-time, contextual activation
Experian’s industry-leading Offline and Digital Graphs are widely adopted across the advertising ecosystem, powering identity resolution and audience activation for the world’s top marketers. Our integrations span 30+ direct and 200+ indirect activation platforms, including leading DSPs, CTV networks, and commerce environments.
With real-time, AI-driven contextual intelligence, Experian enables privacy-safe targeting even in signal-limited environments through solutions like Contextually-Indexed Audiences that deliver reach without reliance on cookies or personal identifiers.
4. Platform flexibility
Modern marketing requires interoperability. Experian’s onboarding framework is technically integrated across multiple platforms, offering brands and data providers the freedom to activate where they choose.
Whether through self-service onboarding in Audience Engine for first-party data or managed onboarding for third-party monetization, Experian scales with your organization, providing transparent pricing, seamless delivery, and dedicated support teams to ensure every connection performs.
5. Human-centered innovation
Marketing should strengthen relationships and build trust. Our AI-driven identity systems are designed to protect privacy, respect individuals, and create real human value — helping brands connect with people meaningfully. They aren’t built to collect more data but to make better use of the data you already have by connecting insights responsibly and ethically.
Every innovation at Experian is guided by the principle of balancing personalization with compliance.
Top use cases for Experian’s onboarding solutions
Our onboarding solutions are transforming how brands operate across industries every day. Whether you’re deepening loyalty, expanding reach, or proving performance, Experian helps connect data responsibly to drive measurable results.
Here’s where we make the biggest impact:
- Automotive: Connect purchase intent data with digital identifiers for more efficient targeting.
- Commerce media: Use both first- and third-party onboarding — first-party for on-site activation and owned marketing, third-party for off-site activation and monetization —all while maintaining compliance and accurate attribution.
- CPG: Activate shopper data through retailer partnerships to drive off-site reach and stronger brand collaboration.
- Data providers: Monetize audience segments across Experian’s programmatic and TV integrations.
- Financial services: Deliver compliant, personalized cross-channel offers with unified identity.
- Healthcare: Use National Provider Identifier (NPI) onboarding to reach healthcare professionals compliantly.
- Retail: Power loyalty personalization, partner monetization, and CMN audience activation.
Across each use case, Experian’s privacy-first identity foundation turns data onboarding into a trusted driver of growth and stronger customer relationships.
Navigate the new data economy with Experian
Data onboarding has come a long way, mirroring the changes in marketing itself. We’ve moved from relying on third-party cookies to empowering first-party data, and now to building collaborative ecosystems like CMNs.
At Experian, we’re right in the middle of that evolution. With decades of data expertise, privacy leadership, and AI-driven activation, we help marketers connect more responsibly, measure what matters, and grow with confidence.
Want to see what that looks like for your brand? Let’s build safer connections together.
Start connecting responsibly
Data onboarding FAQs
Experian First-Party Onboarding helps brands take the customer data they already own, like CRM lists or loyalty files, and use it safely across digital channels for targeting, personalization, and measurement. Experian Third-Party Onboarding helps retailers, publishers, and data providers share or monetize their audiences responsibly with partners through secure, privacy-first activation.
Both are powered by Experian’s trusted identity foundation that keeps every connection accurate, compliant, and privacy-safe.
The difference between first- and third-party onboarding is who’s using the data. First-party means a brand is activating its own customer information, while third-party means that data is being shared or used by another advertiser or partner.
First-party onboarding becomes third-party onboarding most often in CMNs or commerce media. When a retailer monetizes its first-party shopper data for use by CPGs or advertisers, the use case shifts to third-party onboarding.
First-party onboarding helps brands reach and understand their existing customers, while third-party onboarding helps expand reach, enable partnerships, and monetize data responsibly.
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Study reveals that brands with more mature identity programs were significantly more likely to be successful in achieving their key objectives Tapad, a part of Experian, a global leader in cross-device digital identity resolution and a part of Experian, has commissioned Forrester Consulting, part of a leading research and advisory firm, to conduct a new study that evaluates the current state of customer data-driven marketing and explores how marketers can use identity solutions to deliver privacy safe and engaging experiences, in an evolving data landscape. The study highlights the changing ground rules for digital marketing and the threat that poses to marketers’ ability to deliver against long standing KPIs and campaign goals. Nearly two-thirds (62%) of respondents said that the forces of data deprecation will have a significant (40%) or critical (21%) impact on their marketing strategies over the next two years. Among those surveyed, identity resolution strategies have surfaced as an opportunity to create more powerful customer experiences, with 66% aiming to have it help improve customer trust and implement more ethical data collection and use practices, while nearly 60% believe it will point the way to more effective personalization and data management practices. Although organizations are eager to implement identity resolution strategies, a complex web of solutions and partners makes execution a challenge. For example, respondents report using at least eight identity solutions on average, across nearly six vendor partners, and they expect that fragmentation to persist in the ‘cookieless’ future. Additionally, brands’ identity resolution technologies typically represent a patchwork of homegrown and commercial solutions. Eighty-one percent of respondents use both in-house and commercial identity resolution tools today, and 47% use a near-equal blend of the two. Despite the challenges, many brands have the foundation for a strong identity resolution strategy in place, and they are thriving as a result. Specifically, more mature brands were 79% more successful at improving privacy safeguards to reduce regulatory and compliance risk, 247% more successful at improving marketing ROI, and over four times more effective at improving customer trust compared to their low-maturity peers. Additional insights include: Marketers Are Increasingly Playing a Key Strategic Role Within the Organization, But There is a Mandate to Demonstrate Value. Nearly three-quarters of respondents in our study agree the marketing function is more strategically important to their organization than it used to be, while almost two-thirds agree there’s more pressure than ever to prove the ROI or business performance of their activities. Consumers Expect Brands to Deliver Engaging Experiences Across Highly Fragmented Journeys: Tapad, a part of Experian found that 72% of respondents agree that customers demand more relevant, personalized experiences at the time and place of their choosing. At the same time, 67% of respondents recognize that customer purchase journeys take place over more touchpoints and channels than ever, and 59% of respondents agree that those journeys are less predictable and linear than they once were. Marketing Runs on Data, But the Rules Governing Customer Data Usage are Ever-Evolving: According to the study, 70% of decision-makers agree that consumer data is the lifeblood of their marketing strategies – fueling the personalized, omnichannel experiences customers demand. At the same time, 69% of respondents recognize that customers are increasingly aware of how their data is being used. At least two-thirds agree that data deprecation, including tighter restrictions on data use (66%), as well as operating system and browser changes impacting third-party cookies (68%) means that legacy marketing strategies are unlikely to remain viable in the long-term.“ Our latest survey findings give us a better understanding of how our customers and other companies around the world are trying to master the relationship between people, their data and their devices,” said Mark Connon, General Manager at Tapad, a part of Experian. “This research shows why it's fundamental for the industry to continuously work to develop solutions that are agnostic. Tapad, a part of Experian has worked tirelessly to deliver on this with our Tapad Graph, and by introducing solutions like Switchboard to help the evolving ecosystem and in turn helping customers reap the benefits of better identity in both short and long-term.” The study is founded on an online survey of over 300 decision-makers at global brands and agencies, which was fielded from March to April, 2021. Data deprecation and identity are fast-developing, moving targets, so this study delivers targeted insights and recommendations for how to prepare for coming shifts in customer data strategies – whether they manifest tomorrow or a year from now. Get in touch
Third-party cookies have been a crucial component in people-based advertising and digital identity. With Google's recent announcement of delaying third-party cookie deprecation to 2024, the industry has more time to rethink how to effectively identify and communicate with consumers when the time comes. Preparing for cookie deprecation Solving for the post-cookie world is mission critical, particularly as consumer expectation for a relevant digital experience is heightened. We’ve seen a number of industry participants, including brands, publishers, data providers and technology platforms, work around the clock to find an alternative to third-party cookies—one that amasses the same scale and reach but also maintains consumer privacy. In fact, industry insights echo that sentiment. According to a white paper from Winterberry Group, Collaborative Data Solutions: The Evolution of Identity in a Privacy-First, Post-Cookie World, sponsored in part by Experian, one of the most frequently heard comments was the urgency for the industry to develop post-cookie, privacy compliant solutions that work in a more integrated manner. And if there was one overarching position regarding the research into the future of identity, it’s that collaboration is key. Participants in the white paper expressed that with the elimination of third-party cookies, there will be a surge in collaborative solutions across and within companies to accommodate changes in the digital marketplace. Collaborative data solutions must move beyond new post-cookie identity replacements and encompass more holistic approaches, including first-party data. First-party data sharing Currently, 64.3 percent of organizations in the US collaborate with other organizations to share first-party data for insights, activation, measurement or attribution, and 16.7 percent in the U.S. have plans to. Virtually all US companies surveyed were aware of the option to collaborate with other organizations and expressed openness to discussions around sharing first-party data. What is the solution to third-party cookie deprecation? The deprecation of third-party cookies is creating a shock in the marketing and advertising world because there has been an over-dependence on one type of identifier. Therefore, the solution to identify consumers across the digital ecosystem will not come from a single replacement for third-party cookies. Instead, it will rely on a combination of solutions, including collaborative data between organizations and implementation of proprietary first-party data strategies, as well as a framework that can connect all these touchpoints together. Experian can help you navigate the cookieless future Experian is focused on building a more effective advertising ecosystem that promotes the interoperability of digital touchpoints while enabling and fostering new innovations in a privacy forward way. Contact us today and get started with building connected identity in the ever-changing data landscape. To learn more, watch the recording of our webinar with The Vitamin Shoppe where we discuss identity and how you can drive more addressable audience strategies amidst diminishing data signals. Get in touch
As today’s digital landscape gets more and more complicated there are more ways for brands to connect with users and drive purchases and more ways for ad tech to target and measure those touch points. As in-person shopping picks up steam due to the re-normalization of society post-COVID 19; the connection between digital ads and in-person purchases needs to be made once again. With the rise of Connected TV throughout the pandemic there are even more digital opportunities to target a user. But how do you make sure that those brand engagements are captured and correctly attributed to offline purchases and conversions? The answer lies in a holistic identity resolution strategy. Cross-device identity resolution with The Tapad Graph connects the identifiers and devices of individuals within a household to each other; enabling targeting, frequency capping, extension, segmentation and measurement or attribution between devices; including Connected TV and hashed (privacy-protected) email addresses along with Cookies, Mobile Ad Ids and IP Address. Brands can join their first-party data to The Tapad Graph to execute strategies that connect online and offline data for pre, mid and post-campaign efficiencies. Let’s imagine a scenario in which an outdoor retail brand is targeting users watching specific content on a Connected TV device. Powered by identity resolution, they start with a general ad on CTV and continue targeting down individual paths with each user. When one of them converts in store and makes a purchase; the outdoor retailer can connect that action through location and in-store traffic data with the cross-device identity resolution used to execute the digital campaign. Now the actions of the user online and offline are resolved for more accurate measurement and attribution after the campaign ends. But it doesn’t stop there– the brand's CRM data can be reactivated for the next digital campaign and leveraged to capitalize on the most effective media mix for the user who made the purchase previously. These combined insights can be invaluable in shaping up future campaign strategies with geo-contextual ads, recommended additional products and personalization to help drive more conversions and purchases in-store or online. As in-person shopping picks back up and marketers are tasked once again with balancing online and in-store KPIs, the right identity resolution strategy can unlock necessary efficiencies for retailers, ad tech vendors and agencies tasked with supporting these initiatives. Get in touch