
Ongoing signal loss is driving marketers, agencies, and platforms to turn to supply-side advertising. By using first-party data from publishers and platforms, supply-side advertising has the potential to deliver high-quality audience and context for more effective ad targeting.
The supply-side refers to the publishers and platforms that sell advertising inventory. These companies have access to first-party data about their users, which can be used to target ads more effectively. By tapping into supply-side advertising, you can overcome the challenges of signal loss and target ads more effectively.
To shed light on this topic, we hosted a panel discussion at Cannes, featuring industry leaders from Audigent, Captify, Newsweek, Pubmatic, Truthset, and Experian.

In this blog post, we’ll explore how partnerships between supply-side channels and publishers are working to enhance advertising opportunities while balancing the need for transparency and control in programmatic ad buying.
Shift toward supply-side advertising
Traditionally, the demand-side dominated the programmatic media buying chain due to an abundance of supply. However, with the emergence of finite data and its interpretation, collaboration between supply-side technology companies and publishers is required to redefine these economics.
It’s no longer sufficient for the demand-side to blindly negotiate prices based on limited knowledge. Marketers can still define their target audience, but effective communication is key. This presents an opportunity for premium journalistic outlets to guide the industry’s understanding of how data from the supply-side impacts media buying economics in the future.
“Supply-side technology partnerships with publishers are now in a position to shape the economics of programmatic media buying as there is a finite amount of data. It’s crucial for supply-side technology companies to collaborate with publishers to shape these new economics. This presents an opportunity for premium journalistic outlets to provide guidance on how data from the supply-side can affect the future of media buying.”
matthew papa, svp, business & corporate development, captify
Democratizing data from the supply-side
Cookies haven’t brought significant benefits to premium publishers. They mainly serve to retarget users from sites like The Wall Street Journal to advertising sites. This approach primarily serves the purpose of generating revenue.
The elimination of third-party cookies presents an opportunity for premium publishers to shift this dynamic. By using their knowledge of first-party audiences, and using identifiers like Experian’s LUID, publishers can own and understand their audience data, which can then be modeled.
Here’s how publishers can win
Establishing a connection with consumers and emphasizing the value exchange is essential to building trust. Determining what incentives and benefits consumers find meaningful will be crucial in gaining their opt-in.
With consumers
The Apple tracking transparency initiative, specifically the deprecation of IDFA signals, had significant implications for mobile app developers. Overnight, opt-in rates plummeted, causing a drastic decline in iOS ad monetization. To combat this, developers focused on demonstrating the value exchange to consumers—better ad experiences and personalized content.
By articulating the benefits over a couple of years, opt-in rates increased from 10-15% to 30-40%. The key takeaway is the need to effectively communicate the value exchange to consumers.
With partners
Trust plays a crucial role in planning your first-party data strategy. Publishers, advertisers, and data partners highly value their proprietary data. However, there are concerns about how it’s used, mishandled, or leaked in the ecosystem. Building trust between partners is essential. It’s important to work with trustworthy partners who are agnostic, committed to innovative solutions, and globally oriented. These partners can help navigate the complexities of laws and regulations. Choosing the right partners is crucial in a world where first-party data is a key asset.
“Power is shifting toward brands that have strong relationships with customers and possess first-party data. As the ownership of customer data becomes more important, it is crucial to establish a first-party data strategy to better serve customers and adapt to changing market dynamics.”
chip russo, president, truthset
Balance probabilistic and deterministic data
Focus on building trust with consumers and collaborating with reliable companies to share data. However, it’s important to remember that achieving a 100% opt-in rate is unlikely.
The cookie, which has become omnipresent, requires us to shift our strategic thinking. We need to consider both deterministic and probabilistic approaches instead of viewing them as mutually exclusive. The landscape will be fragmented, with some consumers opting in and others not.
“Probabilistic and predictive audience data holds immense potential. With the power of AI, we can expect enhanced performance and efficacy in media campaigns. At Audigent, we firmly believe that this data will outperform deterministic data, making it an integral part of our strategy.”
drew stein, ceo, audigent
Premium content
Trust plays a crucial role in leading to premium content. By placing trust in the best media brands, data, and technology partners, we can expect to see improvements in media, journalism, and advertising. This shift may have a direct impact on the long tail of free natural resources, making it more challenging for them to thrive. However, this change is ultimately beneficial since it promotes higher-quality media experiences overall.
“The homepage surface is making a comeback in the publishing industry, proving its value in establishing a direct connection with readers. While we acknowledge the importance of technology partnerships for addressability and identity, our core competency as a publisher remains outstanding journalism that captures and engages great audiences.”
kevin gentzel, cco, newsweek
Watch our Cannes panel for more on supply-side advertising

We hosted a panel in Cannes that covered supply-side advertising. Check out the full recording below to hear what leaders from Audigent, Captify, Newsweek, Pubmatic, Truthset, and Experian had to say.
Check out more Cannes content:
- Our key takeaways from Cannes Lions 2023
- Insights from a first-time attendee
- Four new marketing strategies for 2023
- Exploring the opportunities in streaming TV advertising
- The future of identity in cookieless advertising
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It’s been one week since the highly anticipated Cannes Lions 2023 – the event of the year for advertising and creativity. We're thrilled to share our top four key takeaways from the event, showcasing what the industry will prioritize in the upcoming year. Signal loss At Cannes Lions 2023, experts underlined the detrimental effects of signal loss on advertising and emphasized the significance of having diverse channels. Discussions emphasized the importance of adapting paid media strategies to align with evolving consumer behaviors in order to remain relevant in the ever-changing landscape. Urgency in planning and avoiding being caught without a solid strategy was a common theme throughout the event. Alternative identifiers, like first-party data, were highlighted, as they prioritize privacy-centric approaches. Contextual advertising emerged as a key part of the solution, providing relevant ads that fit seamlessly into the user's experience. Collaboration Collaboration was a major theme at Cannes Lions 2023. Attendees explored topics such as maintaining privacy and identifying the right attributes for effective targeting. Clean rooms were discussed as a way to ensure privacy when sharing data, and highlighted partnerships as the key to unlocking interoperability within the advertising ecosystem. The discussions underscored the need for industry players to join forces and collaborate on solutions that benefit all stakeholders in the ecosystem. “What makes Cannes unique is that you have a lot of decision makers in the room at the same time. This leads to more efficiency in terms of coming up with goals and objectives and really getting to the heart of the key aspects for us to build partnerships.”alison omealia, vp, customer success, experian Personalization Personalization was a key topic of discussion at Cannes Lions 2023, with its growing significance in advertising taking center stage. The event emphasized the need to focus on serving up tailored content that resonates with individual consumers, cultivating brand affinity. The intersection of science and art was highlighted, emphasizing the role of data-driven insights and creativity in supporting frequency capping and delivering engaging content. Advertisers are adapting to cookie deprecation by shifting from cookie-based third-party targeting to first-party data solutions. This is due to the significant changes in the consumer privacy landscape, which have limited advertisers' access to signals emitted by consumers through their devices and browsers. As a result, alternative IDs like UID2, Ramp ID, and ID5 are emerging as viable options for advertisers to continue personalized targeting. Balancing AI and creativity at Cannes Lions 2023 Participants shared invaluable insights on how to strike the right balance between harnessing AI's capabilities and nurturing creativity to keep the human touch alive. The event emphasized the importance of understanding the boundaries of AI while utilizing tools that drive innovation and imagination. Attendees explored the dynamic roles that AI provides and discussed how it can help push the boundaries of their creativity while still keeping the human element intact. As technology continues to advance, so does the need for advertisers to adapt their approach and integrate AI in a way that enhances their creative output. Experian events at Cannes Lions 2023 We hosted a series of events that included a kick-off event and four panels. The activities were designed to provide attendees with valuable insights on various topics related to advertising and data privacy. Here's a recap of what we covered during the week. Experian’s Cannes Lions kick-off event We co-hosted a kick-off event on Sunday with Audigent. It was a successful event that brought people together to launch an important week in the AdTech industry and build connections with clients and prospects alike. Data on the sell-side Ongoing signal loss has marketers, agencies, and platforms tapping directly into the sell-side for high-quality audience and context. In this panel, industry experts from Truthset, Captify, Audigent, Newsweek, and PubMatic joined Experian to discuss the imminent disappearance of cookies and the need to adapt and future-proof data privacy strategies. The deprecation of third-party cookies presents an incredible opportunity to redefine data privacy practices and empower consumers. Our panelists emphasized the need to adapt and invest in alternative identifiers in order to thrive in a cookie-less future. Publishers were urged to create valuable content, engage in first-party activities, and consider the next generation of consumers who are growing up without traditional identifiers. The fragmented landscape calls for a variety of tactics and partnerships, while AI can provide opportunities to explore beyond deterministic identifiers, fostering creativity and innovation in advertising practices. Stacking the marketer's toolbox for success In partnership with Adweek Abroad in Cannes, industry leaders from FreeWheel, Tubi, and Instacart joined Experian to discuss opportunities for brands to unlock deeper, richer, and more scalable insights into current and potential customers. The panelists highlighted several key considerations, including building a robust first-party data strategy, ensuring accuracy in data quality partnerships, and establishing better-connected communications and relationships with consumers. Participants acknowledged the value of consumer data and urged advertisers to remain purpose-driven, always putting the viewer first. The freshness and recency of data were identified as critical factors for establishing quality connections with consumers and staying attuned to consumer trends. What does the future of identity hold? During this panel discussion, industry leaders from the IAB, MiQ, Cint, Direct Digital Holdings, and Tatari joined Experian to explore the future of identity. The panelists discussed the challenges cookie deprecation poses in programmatic advertising and the need for new identifiers and solutions. They also acknowledged the expanding media landscape and the importance of frequency capping and attribution measurement in a post-cookie era. Trends to watch for include the potential consolidation of identifiers and the movement of first-party data in-house by larger media companies. Panelists shared different views on cookie deprecation readiness and the overhype of AI in the industry. Streaming takes center stage OMG, Roku, AMC Networks, Paramount, and Disney joined Experian to discuss streaming TV as a fragmented and evolving landscape. The panelists debated whether it has become a performance channel and emphasized the need for client education, attribution, and optimizing performance metrics. They also discussed reaching audiences across different mediums with data interoperability, audience targeting, and reliable identity solutions. The panelists explored the emerging trend of AI, optimizing ad placement, refining targeting, streamlining creative approval, and enhancing ad breaks. “A lot of trends in AdTech are relevant to TV, but the most consistent trend has definitely been having a solid identity source throughout the whole lifecycle of a campaign within TV.”ali mack, sr. director, platforms, experian Watch our panels Let’s keep the conversation going The innovation and possibilities for signal loss, collaboration, personalization, and balancing AI and creativity are limitless, but understanding exactly how to get there is what can make all the difference. As we wrap up another successful week at Cannes Lions, let's use these conversations as an opportunity to advance together toward a more connected future — what trends are you most looking forward to? If you’d like to discuss any of these topics further, get in touch with us! Contact us Check out more Cannes content: Insights from a first-time attendee Four new marketing strategies for 2023 Exploring the opportunities in streaming TV advertising The future of identity in cookieless advertising Maximize ad targeting with supply-side advertising Follow us on LinkedIn or sign up for our email newsletter for more informative content on the latest industry insights and data-driven marketing. Latest posts