
We’re excited to introduce the next segment in our Q&A series, Ask the Expert! Ask the Expert features a series of conversations with product experts where we dive into the areas you care most about like identity resolution, targeting, attribution, and more. Our next segment features a conversation about sell-side targeting.
Mike Chowla, SVP of Product at OpenX joins us to chat with Experian’s SVP of Sales & Partnerships, Chris Feo. OpenX is the world’s leading sell-side platform for audience, data, and identity targeting. In their conversation, Mike and Chris review:
- The shift to targeting on the sell-side
- How first- and third-party data are being used on the sell-side
- How OpenX is thinking about alternative IDs

What is sell-side targeting?
Sell-side targeting optimizes the way buyers and supply-side platforms (SSPs) work together. This approach moves the responsibility of inventory and audience targeting from the demand-side platform (DSP) into the SSP, providing advertisers with increased reach and better performance.
With sell-side targeting, locating your target audience becomes easier as you have a more direct connection with publishers. This increases your ability to scale against a target audience. Specifically, the SSP directly matches the buyer’s audience or data segment to the publisher inventory and audience and automatically sends the impression to the buyer’s DSP of choice via a deal ID, providing advertisers with improved reach and performance metrics as well as control over their inventory. With more direct access, your budget can likely go further, and you can decrease your effective cost per mille (eCPM) and get more working media.
“Supply-side targeting is the next phase of how supply path optimization (SPO) and buyers will need to work more closely with SSPs.” – Mike Chowla, SVP, Product, OpenX
Buying on the sell-side vs. open exchange
When buying on the open exchange, you have access to a vast number of impressions. With sell-side targeting, you can apply your campaign targeting directly on the supply-side and activate those impressions through a deal ID. Sell-side targeting works across various formats including web display, mobile, in-app, and connected TV (CTV) for a seamless advertising experience.
OpenX offers the unique capability to match users using their device graph within their SSP. This means you can target users from traditional data sources such as cookies or mobile ad IDs (MAIDs) and reach them in CTV or app environments. This gives you even more reach and precision in your advertising efforts.
The role of first- and third-party data on the sell-side
Buyers are showing a keen interest in bringing their own first-party data into the process of sell-side targeting. Meanwhile, certain agencies have been actively involved in working with identity and data. OpenX is currently collaborating with several agency ID solutions such as Choreograph, Merkel, and Horizon.
Buyers are also purchasing third-party data and data segments from various providers through OpenX’s platform for sell-side targeting purposes. By utilizing this data on the supply side, buyers are able to increase the match rate against their first- and third-party data segments in all environments. This ultimately maximizes scale against these audiences and drives a more efficient CPM due to eliminating waste.
Measurement and attribution on the sell-side
In the current state of SSP advertising, there is more of an emphasis on targeting capabilities than measurement and attribution. That said, SSPs can provide granular log level reports that can be utilized for multi-touch attribution (MTA) or mixed media models (MMM). These granular insights not only inform measurement and attribution models, but they also provide valuable optimization insights such as clearing price.
Additionally, advertisers have all of the same reporting options that they’re used to getting through their DSP because their buys are activated via deal ID in the DSP of their choice.
What to consider when transitioning to sell-side targeting
There are two primary items you should consider when transitioning to sell-side targeting:
- Supply
- Reach
Reach
Collaborating with partners who have the right capabilities can greatly improve reach and audience extension across different devices. For instance, if you bring your first-party audience or a third-party audience and are identifying that consumer via a cookie or MAID, being able to extend that targeting segment to other devices and platforms can be highly beneficial.
Supply
It’s crucial to collaborate with partners who have the right access to supply and direct connections with publishers. While targeting is essential, it’s equally important to have high-quality supply to drive performance.
Reaching consumers in a cookieless future
Whether you’re targeting on the demand or sell-side, it always starts with the consumer and who you’re trying to reach.
Significant changes in the consumer privacy landscape are impacting advertisers’ ability to access various signals emitted by consumers through their devices and browsers. Recent developments from Apple and Google have further amplified this situation.
Alternative IDs as a solution to signal loss
In response, we’re seeing the emergence of alternative IDs like UID2, Ramp ID, and ID5. OpenX supports these types of IDs and considers them crucial for audience buying in a privacy-centric cookie-less future.
We are still in the early stages of this evolution. While some of the IDs have good coverage, cookies will continue to be the primary targeting method as long as they remain available.
Nevertheless, we see alternative IDs as one of several solutions that will become increasingly important as third-party cookies disappear. Contextual buying will also emerge, and a set of solutions will come together to enable advertisers to keep finding their audience in a cookie-less world.
Overcoming signal loss with identity resolution
Looking ahead, as we continue to lose signals due to the evolving consumer privacy landscape, we will witness two things:
- Continued fragmentation
- A wide variety of identifiers
Content will continue to be available on various devices. We’re currently experiencing the emergence of connected TV, but who knows what other devices will surface over the next five to ten years. As cookies disappear, which have been the primary identifier, and alternative IDs are introduced, the wide variety of identifiers will create further fragmentation. This highlights the need for identity in the future.
Identity resolution at Experian matches fragmented identifiers to a single profile to create a unified, cross-channel view of your consumers. Our identity resolution solutions can help future-proof your marketing strategies.
How Experian and OpenX work together
Experian is a key player in OpenX’s OpenAudience solution and helps to power many of their data segments as well as their identity graph. While OpenX collaborates with a variety of providers and operates a fully interoperable platform, Experian remains valuable to the core technology within OpenX’s SSP.
“Experian powers a lot of the data segments and identity graph that OpenX has in our OpenAudience capabilities as part of our SSP.” – Mike Chowla, SVP, Product, OpenX
Watch the full Q&A
Visit our Ask the Expert content hub to watch Mike and Chris’s full conversation on sell-side targeting. In the Q&A, Mike and Chris also share their thoughts on the impact artificial intelligence (AI) will have on the AdTech industry and their go-to sources for staying up to date on all things AdTech.
Get in touch
About our experts

Mike Chowla, SVP, Product, OpenX
Mike Chowla is the SVP of Product at OpenX where he leads product development and innovation, from customer discovery and user research to the development, delivery, and support of a market-leading product suite. Chowla holds a BS in Engineering from the University of Southern California, and an MBA from The University of Pennsylvania.

Chris Feo, Chief Business Officer, Experian
As SVP of Sales & Partnerships, Chris has over a decade of experience across identity, data, and programmatic. Chris joined Experian during the Tapad acquisition in November 2020. He joined Tapad with less than 10 employees and has been part of the executive team through both the Telenor and Experian acquisitions. He’s an active advisor, board member, and investor within the AdTech ecosystem. Outside of work, he’s a die-hard golfer, frequent traveler, and husband to his wife, two dogs, and two goats!
Latest posts

Autotrader leverages The Tapad Device GraphTM to achieve higher performance and reach new audiences across all devices New York, NY – September 6, 2017 – Tapad, the leader in cross-device marketing technology and now a part of Experian, today revealed findings from a campaign conducted with Autotrader which connects with more actual car buyers than any other third-party listing site.* Autotrader’s premium audience, combined with the Tapad Device GraphTM, delivered significant audience extension across desktop, mobile, and tablet to drive awareness and maximize both reach and delivery across screens. To help analyze shopping behaviors across multiple devices, the global automotive brand for this campaign turned to Autotrader and Tapad, who created a cross-device pre-roll video strategy with a focus on viewability, concentrating on potential customers already searching for vehicles. By using a one-to-one connection, instead of look-alike modeling, Tapad also ensured that the automotive brand discovered only new consumers across all of their devices. This approach discovered a new potential audience of more than 14 million consumers, eliminated communication waste and the risk of duplicates, increased overall performance, and ensured more of their campaign dollars reached meaningful audiences. Overall, this case study represents a leap forward in terms of audience-based targeting and the highly-sought after multi-touch attribution modeling. “We really enjoy working with the team at Tapad to help execute our Audience Extension campaigns”, said Lynne Green, product manager at Autotrader. “Their ability to meet the demands of an ever-changing industry, as well as their dependable customer service has allowed us to confidently deliver against our unique in-market automotive audience and provide our clients ongoing messaging opportunities to our audience beyond Autotrader.com.” “How identity relates to conversion behavior is a complex part of any advertising campaign,” said Jeff Kelosky, RVP and head of global automotive at Tapad. “After identifying auto consumer’s behavioral patterns and device usage while shopping for vehicles, we knew we could successfully help Autotrader and its automotive brand clients maximize campaign viewability and drive results.” To learn more about using Audience Extension with Autotrader, click here. For more about the Tapad Device GraphTM, or to request a demo, visit https://www.experian.com/marketing/consumer-sync Contact us today

With campaigns applied to seven major holding companies, Tapad continues to see healthy adoption with The Trade Desk clients NEW YORK, NY – August 23, 2017 - Tapad, now a part of Experian, the leader in cross-device marketing technology, today announced its ongoing momentum with The Trade Desk, Inc. (Nasdaq: TTD), a global technology platform for buyers of advertising. Tapad is providing cross-device segments from the groundbreaking Tapad Device GraphTM through The Trade Desk’s platform. Since 2015, Tapad has seen steady growth in the use of its cross-device data across The Trade Desk platform. This forward progress continues, as 1H2017 saw important milestones for Tapad. Seven major private and independent holding companies now apply Tapad’s data to their campaigns, in addition to more than 1,500 unique brands. Tapad’s proprietary Device GraphTM connects billions of devices, providing unified and insightful data for brands, agencies, and marketers across the globe. Several of these clients, representing varying industries from financial, to auto, CPG and retail, apply Tapad’s data across a number of key tactics and strategies, including: first party CRM extension, third party audience extension, cross-device retargeting, cross-device frequency management, and more. Clients in these verticals continue to rely on Tapad’s cross-device data, as Tapad saw the amount of usage by financial and retail clients grow by four times over the past year, and double for automotive and CPG clients. “We are pleased to offer our clients access to Tapad’s device graph”, said David Danziger, VP of Data Partnerships, The Trade Desk. “Their cross-device identification capabilities have been a powerful addition to our omnichannel platform.” “This integration is a shining example of the amplifying effect of two of the best platforms working together,” said Chris Feo, SVP of Global Partnerships at Tapad. "Clients leveraging Tapad's Device Graph in The Trade Desk platform have the potential to see higher returns and reach with access to substantial cross-device data, as well as a very effective media platform." Contact us today

Tapad Device Graph™ and Sojern’s mobile offering unify travel intent signals; achieve amplification rate of more than 600 percent NEW YORK, June 15, 2017 – Tapad, a part of Experian, the leader in cross-device marketing technology, is partnering with Sojern, travel’s direct demand engine, to provide marketers with an even stronger understanding of travelers as they research and shop across multiple devices. Combined with its 350 million global traveler profiles and billions of predictive purchase intent signals, Sojern utilizes the Tapad Device Graph™ to resolve the complex travel consumer journey, target travelers more precisely, and derive more actionable insights for its travel clientele. According to Sojern’s research, travelers visit hundreds of websites preceding their trip purchase, with some consumers reaching upwards of 450 touchpoints prior to booking. Sojern’s partnership with Tapad will help unify these touchpoints across devices, enabling travel brands to more effectively nurture and engage potential buyers during the purchase process, regardless of which device they use. “Sojern’s been focused on travel for over a decade, helping brands activate predictive purchase signals and leverage our traveler profiles into effective performance marketing campaigns,” said Mat Harris, Sojern’s VP of Product, Enterprise Solutions. “The cross-device insights we gain from the Tapad Device Graph provide a valuable tool for our customers to reach travelers across devices in real-time and at scale, on the right device.” Prior to selecting Tapad as its cross-device partner, Sojern surveyed several probabilistic and deterministic cross-device vendors and performed an extensive global test. The test was an examination of scale, match rate and several other factors, which enabled Sojern to learn as much as possible about each vendor. After examining the final test results, Sojern selected Tapad based on its excellent test performance, tried-and-true experience in the market and complimentary business model. To date, Sojern has already seen an amplification rate of more than 600 percent as a result of the integration, meaning that the Tapad Device Graph is connecting an average of six or more device and browser IDs for every one existing Sojern ID. “Not only is Sojern a compatible partner for our singular Device Graph capabilities, but they are also an incredible data partner to help expand our work in the travel industry,” said Pierre Martensson, SVP and GM of Tapad’s global data division. “Working with the team at Sojern allows us to solve a true challenge within the travel industry today: creating a unified view of customers so travel brands can better understand and access their key audiences at every point along their path to purchase.” Contact us today