
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.
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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!
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Identity-led local advertising that works Local advertisers run on tight budgets, short timelines, and constant pressure to prove what works. Every dollar must count. In this Ask the Expert session, Aaron Brown, Chief Scientist at Madhive, joins Ali Mack, VP of AdTech Sales at Experian, to discuss how the Maverick AI platform helps local advertisers make confident decisions, act on clear recommendations, and see outcomes they can stand behind. Why local campaigns demand accuracy, and how to deliver it Local teams juggle multiple channels, changing budgets, and heavy performance expectations. To stay competitive, local teams need quick answers to three critical questions: Which households are most valuable to reach? Which channels work best in their market? Are campaigns on on track, day by day? Delivering that level of accuracy means working from a single, trusted view of households, channels, and performance, powered by clean, connected, and continuously updated data. “When you think about local, these aren’t enormous budgets. These businesses depend on success from day one and are still finding their footing. There’s a wealth of nuanced information we need to hear from advertisers to ensure their campaigns succeed, and a wealth of insights we need to deliver back. It’s a real-time matching problem at scale to make sure everything runs profitably for our customers.”Aaron Brown, Chief Scientist Why Experian data is the foundation of local planning Data is the foundation of effective local advertising, but not all data is created equal. For local advertisers, the real advantage comes from high-quality, actionable data that pinpoints likely customers and reduces wasted spend. Experian Marketing Data provides the identity and insights spine that helps local advertisers: Identify the right households in each market Build consistent, people-based audiences across partners Activate with confidence and measure outcomes on the same foundation Madhive’s data marketplace builds on this identity layer, curating trusted data sets that advertisers can integrate directly into planning and activation. “We’re focused on creating perfect matches between businesses and consumers. The right data is critical, which is why we started the data marketplace. It’s a curated, opinionated take on the best data to drive outcomes for the companies that depend on us.”Aaron Brown, Chief Scientist Madhive's Maverick AI at the core of local advertising Madhive’s Maverick AI is the AI-powered operating system for local media. Built as a foundational layer behind Madhive’s entire workflow, Maverick AI connects the dots across planning, targeting, reporting, and storytelling. Its purpose is simple yet transformative: turn fragmented data and advertiser inputs into actionable insights at scale. What makes Maverick AI different? AI-driven intelligence It doesn’t just automate tasks; it analyzes signals, connects context across markets, and refines strategies as campaigns progress. Data connectivity Maverick AI integrates diverse data sources, including Experian’s trusted identity data, so local advertisers can target households with accuracy and measure outcomes confidently. Interactive transparency Beyond dashboards, Maverick AI works alongside sellers and advertisers, surfacing insights, flagging missing inputs, and turning transparency into clear next steps. Adaptability From structured KPIs to unstructured signals like lists of recent in-store buyers or priority ZIP codes, Maverick AI uses every clue to inform smarter, faster decisions. "Maverick AI exists to connect local advertisers with data like Experian’s. Its ability to collaborate and tell stories back to advertisers is one of its greatest strengths.”Aaron Brown, Chief Scientist How Maverick AI and Experian Marketing Data turn transparency into results Maverick AI turns performance transparency into aligned plans and faster optimizations for local advertisers and agencies. Paired with Experian’s identity data, advertisers get an accurate, household-level view of real people in real locations. That lets them build consistent local audiences, reach those audiences across connected television (CTV), social, and the open web, and confidently tie ad exposure back to outcomes that matter in each market. “Maverick AI is the foundational layer behind all our operations – targeting, reporting, and storytelling. It connects data across organizations and advertisers, including trusted data sources like Experian. AI works tirelessly to pick up context, connect the dots, and deliver great results end-to-end for our customers.”Aaron Brown, Chief Scientist Your next local campaign starts with Madhive and Experian Local advertising performance starts with a trusted identity foundation. With Experian data and Madhive’s Maverick AI platform, local advertisers can define the right households once, activate their campaigns across CTV and digital channels, and measure outcomes with confidence. Many brands are increasing investment in AI-powered planning to cut waste and grow on-target reach. Let’s work together to make your next campaign a success. Let's solve your local advertising challenges today About our experts Aaron Brown Chief Scientist, Madhive Aaron Brown is Chief Scientist at Madhive, where he leads Mad Labs, the company’s advanced innovation division. With a background spanning mathematics, computer science, and law, Aaron specializes in applying complex technical and theoretical breakthroughs to real-world business challenges. Before joining Madhive, he worked at the machine learning startup Intelligent Life. A graduate of Boston University with degrees in Mathematics and Computer Science, he also holds a J.D. from the University of Southern Queensland and lives in New York City. Ali Mack VP of AdTech Sales, Experian Ali Mack leads Experian’s AdTech business, overseeing global revenue across the company’s expansive tech and media portfolio. With over a decade of experience in digital and TV advertising, Ali drives strategic growth by aligning sales, customer success, and solutions teams to deliver impactful outcomes for clients and partners. She has successfully guided teams through two major acquisitions, integrating sales organizations and product portfolios into unified go-to-market strategies. Under her leadership, Experian has consistently exceeded revenue targets while fostering collaborative, results-driven teams and mentoring emerging leaders. Working closely with finance, product, and marketing, Ali develops strategies that support a diverse ecosystem of publishers, brands, and technology partners, positioning Experian at the forefront of data-driven advertising and identity resolution. FAQs What makes local advertising so challenging? Local advertisers face tight budgets, short timelines, and high pressure for results. They must reach the right households, tailor messaging, and optimize campaigns across zip codes. Experian’s data solutions and Madhive’s Maverick AI platform help overcome challenges like location targeting and data activation without losing signal. How does Madhive’s Maverick AI platform help advertisers achieve better results? Madhive’s Maverick AI platform centralizes operations, targeting, and reporting while enabling granular local planning at scale. It integrates Experian’s data to target households accurately, optimize campaigns across markets, and deliver measurable results, even for advertisers with limited budgets. How do Experian and Madhive foster collaboration in local advertising? Madhive’s Maverick AI platform provides transparency and clear recommendations, aligning advertisers on goals. Experian’s data solutions further enhance this process by providing a unified view of audience behavior, ensuring campaigns remain cohesive and effective across all channels. Latest posts

Audigent, a part of Experian, Dun & Bradstreet, and Experian are collaborating to help business-to-business (B2B) marketers target more effectively. Now, B2B marketers can reach verified decision-makers, keep the same audience across channels, and activate on connected TV (CTV) and digital via the Experian data marketplace. Together, Dun & Bradstreet’s trusted business data, Audigent’s curation and Deal ID activation, and Experian’s identity resolution drive efficient, measurable results. Unify identity and engage B2B audiences With Audigent, Dun & Bradstreet, and Experian working together, you get one dependable way to recognize the same companies and roles everywhere you run. Dun & Bradstreet's D-U-N-S® Number, serves as a stable company identifier, so offline business details map to the right digital profiles, and you can reach verified decision-makers with confidence. Through Audigent and Experian, you can access 400+ Dun & Bradstreet B2B audience segments, matched to a Deal ID and activated via Audigent’s curation engine and Experian’s data marketplace. This provides real-time B2B targeting across connected television (CTV), display, native, audio, and online video (OLV). Utilize differentiated data Dun & Bradstreet audiences are built on verified offline signals (e.g., company, industry, size, role, seniority) linked to the proprietary D-U-N-S® Number for deterministic matching. High-quality firmographic attributes become actionable segments you can activate in leading programmatic platforms. The result: privacy-compliant, performance-driven campaigns with omnichannel B2B targeting. Unmatched scale Dun & Bradstreet’s Data Cloud spans over 600 million businesses across industries and regions, offering unparalleled depth for B2B targeting. Verified business identity The D-U-N-S® Number links verified offline business data to digital environments, enabling accurate and scalable activation. Privacy-first design Data undergoes rigorous validation and is compliant with major global regulations (General Data Protection Regulation (GDPR), California Consumer Privacy Act (CCPA)), enabling responsible activation. Trusted by the enterprise Over 85% of Fortune 500 companies rely on Dun & Bradstreet B2B data for its depth, accuracy, and broad coverage of small and medium-sized businesses (SMBs). Three ways unified B2B identity improves media performance Target with accuracy: Use deterministic firmographics. Dun & Bradstreet’s D-U-N-S® Number anchors a consistent way to recognize the same company, linking offline signals to authenticated business entities. Reduce waste: Activate curated PMPs for efficient spend. Audigent’s curation engine packages those audiences into Deal IDs and routes through cleaner, more predictable supply paths, so more budget reaches the buyers that matter. Publishers see up to 75% net revenue increase after fees, while brands save 36–81% on data segments and achieve 10–30% higher video completion rates. Stay consistent: Maintain identity across all channels. Use the same audience criteria across CTV, display, native, audio, social, and OLV to improve match consistency without relying solely on third-party cookies. Improve addressability with Experian's Digital Graph Advertisers can use Dun & Bradstreet’s off-the-shelf segments to target specific audiences accurately across channels. By connecting Experian’s Digital Graph with Dun & Bradstreet’s company and contact data, marketers gain a clear advantage: one durable identity that improves match rates, keeps reach consistent across CTV and digital, and aligns targeting with measurement. What that means in practice: Higher match rates without third-party cookies. Expect consistent reach across CTV and digital with one audience anchored to the same identity. Cleaner measurement because activation and identity stay in sync. Suggested use cases Below are simple ways to put this to work, using Dun & Bradstreet business data and Audigent Deal IDs so the same audience runs and measures the same everywhere. Target key decision-makers Reach professionals in Finance, Sales, Healthcare, and IT/Technology by job role, company size, and industry, driving awareness and consideration across complex buying committees. Reach SMB owners Target companies with fewer than 50 employees to connect with small-business owners and operators. Activate across channels via Audigent Deal IDs for consistent delivery and measurement. Achieve more with Audigent, Dun & Bradstreet, and Experian Together, Audigent, Dun & Bradstreet, and Experian allow marketers to activate high-quality B2B audiences with confidence, delivering relevant and efficient campaigns. By pairing Dun & Bradstreet’s trusted business data and proprietary D-U-N-S® Number with Audigent’s curation engine, you get deterministic, privacy-compliant targeting at scale, now boosted by Experian’s identity for consistent cross-channel reach. Ready to activate your next B2B audience? Talk to an Experian expert today FAQs What makes Dun & Bradstreet's data unique for B2B targeting? Dun & Bradstreet's data is anchored by the D-U-N-S® Number, a persistent business identifier that links offline signals like company size, industry, and role to digital environments. This ensures accurate, scalable, and privacy-compliant targeting. How does Experian enhance cross-channel reach? Experian's Digital Graph connects devices and IDs at the household level, enabling consistent audience identity across channels, even in cookieless environments. This ensures higher match rates and reliable measurement. What is Audigent's role in this collaboration? Audigent's curation engine creates audience-aligned Deal IDs and PMPs, optimizing supply paths for efficient media buying. This reduces waste and improves campaign performance with cleaner, more predictable targeting. How does this solution support ABM strategies? Marketers can build role-based segments (e.g., IT Directors at mid-sized companies) and activate them across CTV and digital channels. Sequential messaging tailored to buying stages helps accelerate pipeline and drive engagement. Latest posts

Personalization without context misses the moment Marketers have spent years perfecting personalization — but personalization alone often misses the mark. We’ve all seen it. You shop for a weekend getaway, then get served travel ads weeks later when you’re already home. The data was right. The timing wasn’t. Personalization based only on identity and behavior knows who you are but not when or why you’re ready to act. At Experian, we believe AI should make marketing feel more human. That means understanding people in context, recognizing their environment, mindset, and the moment, to create relevance that feels timely, not intrusive. The context gap: Why identity and behavior aren’t enough Identity and behavioral data can reveal the kind of consumer someone is and the kind of products they may want to buy. But they don’t explain what’s happening right now. The missing layer is context: the dynamic, real-time signal that shows why this moment matters. Context bridges the gap between knowing something about a consumer and understanding their intent. In an era of fragmented signals and stricter privacy rules, context is one of the most reliable ways to stay relevant without over-reliance on personal identifiers. It helps marketers adapt to shifting needs while keeping privacy intact. How Experian interprets context in real-time By context, we mean all the subtle, in-the-moment signals, like time of day, location, or what someone’s watching, that shape what people care about in real-time. At Experian, our technology interprets these in real-time: Temporal signals Time-based patterns such as daypart (morning vs. evening), recency (how fresh a signal is), seasonality (holidays, life events), and micro-moments (split-second intent-driven actions). Environmental signals The media or content environment; what type of program, article, or channel someone is engaging with when they see your ad. Situational intent Signals like browsing behavior or purchase patterns that hint at a person’s stage in the buying journey, from early research to final decision. By layering these signals over verified identity and behavioral data, Experian’s AI-powered technology helps marketers predict not just who will act, but when they’re ready to act. Experian’s approach: Turning context into relevance Consumer behavior changes by the minute, and marketers need to adapt just as quickly. Our technology interprets live bidstream data, device activity, content, and timing to optimize in the moment, ensuring your campaigns deliver meaningful relevance, not just broader reach. Our process combines: Input Clean, accurate identity and audience data anchored in our privacy-first framework. Enrichment Our models fuse household, device, and publisher context to reveal moment-based intent. Activation We're investing in agentic workflows that help marketers plan and execute performance campaigns at scale, activated via our real-time technology that dynamically adjusts deals and surfaces contextually aligned opportunities. Governance Every signal and recommendation follows Experian’s principles of transparency, consent, and ethical oversight. We call this AI-powered simplicity tools that help marketers work more efficiently, with intelligence that feels intuitive and human-centered. How context changes the game for marketers AI without real-time context can only react based on what it already knows. AI-powered by in-the-moment contextual data points enables marketers to anticipate, not just react. A travel brand can shift creative from “dreaming” to “booking” mode when AI detects signals of active planning. A retailer can align promotions with trending content or regional weather shifts in real time. A CPG brand can trigger different product messages based on the context of recipes or household occasions. Adjustments based on contextual signals compound into meaningful gains — higher engagement, better efficiency, and a consumer experience that feels natural rather than intrusive. Context makes AI more human Context introduces empathy into automation. It’s what keeps AI from overstepping, ensuring the message fits the moment. When marketers respect timing, environment, and intent, ads feel like service, not surveillance. Context transforms relevance into respect. At Experian, our vision is to make every signal serve people, not profiles. Because the more our technology (including our AI tools and capabilities) understands context, the more human marketing becomes. At Experian, responsible intelligence is built in Every contextual model we deploy adheres to our standards for transparent and responsible innovation. We validate inputs, monitor model drift, and ensure no context-based variable introduces bias or privacy risk. This is what responsible automation looks like in practice: intelligent, explainable, and ethical. From who to when: Context is the future of AI-driven marketing Identity tells us who someone is. Context tells us when it matters. The next wave of AI-driven marketing will unite privacy-first identity with contextual intelligence to deliver real-time relevance, responsibly. At Experian, we’re building that future now. Our AI-driven capabilities bring identity, insight, and generative intelligence together so brands, agencies, and platforms can reach the right people, at the right moment, with relevance and respect. Get started now About the author Matthew Griffiths SVP of Technology, Audigent, a part of Experian Matthew Griffiths is a seasoned technology entrepreneur and a driving force in advertising technology, data technology, and AI. As the Co-Founder and former CTO (now SVP of Technology) at Audigent, a part of Experian, he plays a pivotal role in shaping the company’s cutting-edge solutions for data activation, curation, and identity management. With years of executive experience across the U.S., Africa, and the U.K., Matthew has a proven track record of leadership in steering the adoption and use of cutting-edge technologies to drive business outcomes. His expertise spans from collaborating with top global corporations and governments to spearheading award-winning technology projects that deliver life-changing impacts in some of the world's most underserved communities. Matthew’s dynamic approach to solving complex business and technology challenges makes him a visionary leader in the AdTech space, consistently driving innovation and performance through technology. FAQs How does context make AI-driven marketing more effective? Context makes AI-driven marketing more effective because it helps marketers understand people in context, recognizing their environment, mindset, and the moment, to create relevance that feels timely, not intrusive. Context helps marketers understand not just who a person is, but when and why they’re ready to act. Experian’s AI-powered technology layers contextual signals over verified identity data to deliver relevance that feels intuitive, not invasive. This approach connects recognition with understanding, making every campaign more effective and more human. What is the context gap in AI-driven marketing? Identity and behavioral data can reveal the kind of consumer someone is and the kind of products they may want to buy. But they don’t explain what’s happening right now. That’s the context gap—the missing link between knowing something about a consumer and understanding their intent. Context closes this gap by analyzing environmental, temporal, and situational signals that reveal intent—without using invasive identifiers. Does Experian interpret contextual signals in real-time? Yes, at Experian, our technology interprets contextual signals, including temporal, environmental, and situational, in real-time. By layering these signals over Experian’s verified identity and behavioral data graph, marketers can predict when consumers are most receptive, turning data into real-time opportunity. What does responsible intelligence look like in practice? At Experian, every contextual model we deploy adheres to our standards for transparent and responsible innovation. We validate inputs, monitor model drift, and ensure no context-based variable introduces bias or privacy risk. What does Experian’s foundation in responsible automation look like? – Privacy-first clarity: We unify household, individual, device, demographic, behavioral, publisher first-party signals, and contextual data points to build a reliable view of consumers, even when certain signals are missing. This clarity helps marketers personalize, target, activate, and measure with confidence.- Predictive insight: Our models go beyond describing the past. They forecast behaviors, fill gaps with inferred attributes, create lookalikes, and recommend next-best audiences so clients can anticipate opportunity.- AI-powered simplicity: We’re investing in generative AI and exploring emerging agentic workflows to reimagine how marketers work. Our vision is to move beyond basic audience recommendations toward intelligent audience discovery and automated setup, helping teams uncover opportunities they may not have considered, while spending less time on manual work and more time on strategy and outcomes.- Real-time intelligence: Consumer journeys never stand still. Our AI-powered technology interprets live bidstream data, device activity, content, and timing to optimize in the moment, ensuring campaigns deliver meaningful relevance, not just broader reach.- Transparent and responsible innovation: We drive safe, modular experimentation, from generative applications to agentic workflows, always balancing bold ideas with ethical guardrails. We stay at the forefront of evolving legislation and regulation, ensuring our innovations protect consumers, brands, and the broader ecosystem while moving the industry forward responsibly. Latest posts