At A Glance
As CTV viewership grows, marketers face challenges in targeting and measurement across fragmented platforms. Identity resolution and audience strategies, supported by Experian’s syndicated audiences and privacy-safe solutions, help DSPs and advertisers reach high-value audiences, improve campaign accuracy, and drive measurable outcomes.In our Ask the Expert Series, we interview leaders from our partner organizations who are helping lead their brands to new heights in AdTech. Today’s interview is with George Castrissiades, General Manager of Connected TV at AdRoll.
Premium reach and fragmentation
As viewer attention fragments across platforms, how should marketers redefine “premium reach” in CTV to prioritize engagement and audience quality over scale alone?
A few years ago, ad supported streaming over-indexed on younger adults, those without much financial history and much more budget conscious. It would have been fair for B2B brands to assume that maybe they weren’t going to find their C-Suite audiences on those channels, and so connected TV(CTV) was positioned as a top of funnel tactic aimed at retail. But that’s all changed – ad-free prices are going up, and ad supported tiers are the norm across the majority of channels. 66% of adults have at least one ad supported streaming channel, and adults today spend nearly as much time streaming movies and TV as they spend on their mobile phones. Now that ad viewing audiences on CTV really span the full spectrum of demo, techno, and firmographic segments, savvy marketers should partner with platforms that offer breadth and depth of targeting and measurement to find the highest value audiences wherever they’re watching CTV and serve them highly relevant ads that draw their attention towards the screen. I know I’m jumping out of my seat whenever I see an AdTech or MarTech ad.
Identity and relevance
What does a strong identity framework unlock for delivering household- and person-level relevance across screens, and how does it reshape audience planning?
In privacy-safe ecosystems, people want to share less data and log in to websites and browsers less frequently. If you can’t resolve a household ID to a CTV device through Safari and other sources of obfuscated identity, you’re going to end up losing a lot of signal along the way. On top of that, targeting smaller, higher-value audiences means this attrition can have a profound impact on your ability to build meaningful reach and use audience forecasts to predict scale. A strong identity framework is the key to maintaining as much of your planned audience as possible and staying true to initial forecasts.
AI and outcome planning
How is AI evolving CTV from tactical bidding to strategic outcome planning, and what mechanisms are in place to validate true performance lift?
Tomorrow isn’t guaranteed, especially not in advertising. Audiences change where and when they consume media, and so shifting budget to a placement that did well yesterday is like buying a stock when it’s outperforming – the gains might be gone by then! Predictive AI is bridging the gap to find the highest value and most engaged audiences in real time, versus being purely reactive. This helps drive outcomes which we see in the form of pipeline influence, ROAS, and site traffic lift – without exponentially increasing costs. The same is true for account-based marketing(ABM) outcomes – there’s a blend of signals, account “fit” and intent data that needs to be evaluated in a deeper, more intelligent way. AI is helping to find those highest value accounts, even before they’re in market, which means smart marketers aren’t showing up late to the party.
Measurement and incrementality
What privacy-safe, closed-loop measurement frameworks should become standard to prove incremental visits and sales from CTV campaigns?
Working with a dedicated multichannel, full-funnel ad and marketing platform like AdRoll can easily let you know when a user arrives at your site and makes a purchase, but understanding how that customer arrived there and which tactics deserve the credit requires a deeper, more sophisticated workflow. Our partnership with Experian allows all devices in a household to ladder back up to a household ID, so we can ensure accuracy without pivoting on anything personally identifiable. This works perfectly in CTV, an environment that follows an app workflow of user resettable device IDs rather than IP address or email but always connects seamlessly to web tokens including cookies. Accuracy, scale, and privacy are maintained in a proven way – you see this tech underpinning the infrastructure of streaming across all the biggest players, so marketers can rest easy.
Creative and commerce
How can creative sequencing and shoppable TV experiences convert living-room attention into commerce without compromising user experience or feeling intrusive?
I like to say that CTV trades attention for action. Users lean back and focus on the messaging and visuals of the big screen rather than scrambling for the mouse or tapping to close some intrusive pop-up. This focus means that the messaging is absorbed more quickly, but creatives can wear out their welcome just as fast. Sequential messaging really helps to move the messaging along without subjecting the viewer to longer ads where attention wanes, but also increases brand recall and specific product information because the story evolves with each impression. This is a great tactic to use when you want a viewer to take a specific action later – but shoppable ads can help motivate a user to act now, and new formats can really simplify things. Shoppable can feel out of range for most – the top players in this space own major e-comm storefronts and then tie them back into their own demand-side platforms (DSPs), content, and streaming devices. For the rest of us, dipping our toes in slowly through simple and cheap solutions like QR codes can connect audiences right to a web experience from their TVs, or intermediate solutions like interactive video ads. Users love to play around with fun on-screen experiences, and there’s a whole spectrum of crawl/walk/run options available.
Trust and governance
Which shared guardrails—brand safety, fraud control, and frequency management- are essential to unlocking sustainable, scaled investment in CTV?
I’ve always thought of CTV inventory analogously to high-end watches – if you buy from the source or a well-known, reputable dealer, you’re probably buying the real thing. But that fancy timepiece the guy was selling outside the bar, that you swore looked real? Probably not. Untrusted resellers and too-good-to-be-true pricing might mean you’re running ads on a screen at a lonely gas station at 3 am to an audience of no one, and that’s not even the worst case scenario. Good relationships and deep pockets can solve brand safety and fraud issues, but not every advertiser is going to have those resources. Brand safety and fraud prevention can reduce workload and help distinguish the good stuff from the growing pool of gray area, arguably, CTV inventory that isn’t what was promised to a customer. Outsourcing this trust also goes a long way, with buyers knowing you’re not grading your own homework. Frequency management is equally as important. Once you have your audience and your good supply, it’s important not to abuse a single household just because they meet your targeting criteria. Reach is your best friend with CTV.
Data and audience strategy
How do Experian’s syndicated audiences provide a consistent, scalable foundation for planning, activation, and measurement across CTV and digital, and what outcomes are clients seeing?
We love to talk about how Experian’s data is such an integral part of so much of streaming’s architecture, and the fact that it’s built on deterministic datasets means you’re getting scaled audiences built on knowledge rather than best guesses. That means a lot when working across multiple channels, privacy-safe environments, and households with an ever-growing number of connected devices. Our customers are always delighted at how precise targeting can be, especially in the B2B/B2C space – and knowing the size of those audiences helps them to understand how budget transforms into reach in a more predictable way. It’s confidence-inspiring to point to a new audience and tell your client that these are their future customers. The best part is showing them the outcomes reporting – we consistently see a massive spike in site traffic and engagement on days when a new Experian syndicated audience is launched!
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FAQs
Identity resolution ensures marketers can connect devices and maintain audience accuracy. Experian’s identity solutions help reduce data loss and improve audience forecasts, making campaigns more effective.
With viewer attention spread across platforms, marketers need tools that offer both broad and detailed targeting. Experian’s syndicated audiences provide reliable, scalable data to help identify and reach high-value audiences across channels.
Techniques like sequential messaging and shoppable ads keep viewers engaged and encourage action. Simple tools like QR codes or interactive video ads can connect audiences to web experiences directly from their TVs.
Strong identity frameworks help DSPs maintain accurate targeting and audience reach, even in privacy-focused environments. By connecting devices to household IDs, solutions like Experian’s Digital Graph ensure DSPs can deliver relevant ads and measure performance effectively across channels.
About our expert
George Castrissiades
General Manager of Connected TV, AdRoll
George leads the CTV go-to-market strategy at NextRoll, driving rapid growth and adoption of the channel for both B2B and B2C customers. With a track record of building and scaling CTV solutions, he is focused on developing a strategic playbook that accelerates success in the evolving digital advertising landscape.
Before joining NextRoll, George spearheaded CTV product innovation at iSpot.tv and held leadership roles in product and operations at YouTube, VICE Media, Crackle, Roku, and Innovid. His expertise spans product development, monetization, and market expansion.
About AdRoll
AdRoll is a connected advertising platform built for growth-minded marketers. With powerful AI, flexible campaign tools, and seamless integrations, AdRoll helps mid-sized businesses turn complexity into clarity and clicks into customers. The AdRoll platform delivers full-funnel performance through multi-channel advertising, audience insights, and cross-channel attribution, supporting marketers across industries including ecommerce, technology, financial services, education, and more. For B2B teams, AdRoll ABM extends these capabilities with account-based precision, multi-touch campaigns, and real-time buyer intelligence. Backed by nearly 20 years of data and award-winning support, AdRoll enables marketing teams to advertise smarter, move faster, and achieve more, all from one place.
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Magnite and Experian have formed a strategic integration to enhance cross-device audience targeting in the advertising industry. Magnite, the largest independent sell-side platform, and Experian, a leader in consumer data and identity solutions, aim to optimize advertising capabilities by activating Experian's Consumer View in Magnite Access, an omnichannel audience product suite. This marks one of Experian’s first forays into a direct sell-side integration, a crucial step for the cookieless era. This collaboration offers targeting and efficiency across digital channels, providing advertisers and agencies with a more effective way to reach consumers. With Experian's robust deterministic offline data, generated from consumer purchase activity, enriched with insights on over 250 million U.S. consumers and 126 million U.S. households, advertisers can look forward to a new benchmark in targeted advertising available through Magnite Access. Thriving in a cookieless world With the looming deprecation of third-party cookies, audience, and identity solutions using first-party data are shifting to the sell-side. To that end, Magnite developed Magnite Access, a suite of omnichannel audience products that make it easier for media owners and their advertising partners to maximize the value of their first-party data assets. Access is adept at thriving in a post-cookie world through its effective utilization of sell-side first-party data, including within Magnite Streaming and SpringServe. Magnite Access’ deterministic and probabilistic tools provide sellers and buyers with a comprehensive solution to leverage their first-party data for audience targeting and insights. Experian's solutions are built to work efficiently in offline environments, making them well-equipped to thrive in a cookieless world. Brands can benefit from Experian's deep integrations within the ecosystem, providing data and audience solutions designed to perform in cookieless environments. "We're excited about the collaborative approach between Magnite and Experian. This off-the-shelf integration of Experian's syndicated audiences and the streamlined ability to receive custom audiences will provide a more accurate and cohesive consumer view, allowing us to reach our target audience and enhance campaign performance seamlessly."sam bloom, ceo, camelot Reach and impact As companies continue to rely on data-driven insights to make smarter, more efficient business decisions, partnerships between leading data and technology providers are becoming increasingly valuable. "Integrating with Magnite allows us to translate our extensive offline and online data into actionable, intelligent solutions for making smarter, more efficient business decisions. With Magnite's expertise in the omnichannel sell-side environment, this partnership is poised to empower businesses with the tools they need to succeed in today's data-driven landscape."chris feo, svp, sales & partnerships, experian Strengthening foundations within streaming Magnite's cutting-edge streaming solutions, integrated with Experian's robust data, facilitate a connection between data and inventory, providing enhanced targeting capabilities and consumer insights. "By integrating Experian's Consumer View capabilities into our platform, we are enabling advertisers to unlock improved targeting capabilities while benefiting from Experian's wealth of consumer insights. Our collaboration with Experian amplifies the value of our streaming solutions and enhances the overall advertising ecosystem by seamlessly connecting data, identity, and inventory."kristen williams, svp, strategic partnerships, magnite Precision and innovation: A new advertising era The synergistic partnership between Magnite and Experian is paving the way for a new era in advertising, offering targeting efficiency across digital channels. This collaboration is not merely a confluence of technologies but a testament to both companies' relentless pursuit of excellence in creating a consumer-conscious advertising ecosystem. By harnessing the wealth of consumer insights and integrating state-of-the-art technologies, Magnite and Experian are contributing to shaping the future of advertising, emphasizing accuracy and efficiency. It's a revolutionary stride toward understanding and reaching the consumer in more meaningful and impactful ways, setting new benchmarks in the advertising world. In a rapidly evolving digital landscape, this collaboration stands as a beacon, guiding brands toward intelligent, informed, and innovative advertising solutions, redefining the possibilities in targeted advertising and audience solutions. Connect with us to learn more about how you can access Experian’s Consumer View data solutions in Magnite Access. To learn more about our partner Magnite, visit their website. Latest posts