In 2022, Google began changing the availability of the information available in User-Agent strings across their Chromium browsers. The change is to use the set of HTTP request header fields called Client Hints. Through this process, a server can request, and if approved by the client, receive information that would have been previously freely available in the User-Agent string. This change is likely to have an impact on publishers across the open web that may use User-Agent information today.
To explain what this change means, how it will impact the AdTech industry, and what you can do to prepare, we spoke with Nate West, our Director of Product.
What is the difference between User-Agents and Client Hints?
A User-Agent (UA) is a string, or line of text, that identifies information about a web server’s browser and operating system. For example, it can indicate if a device is on Safari on a Mac or Chrome on Windows.
Here is an example UA string from a Mac laptop running Chrome:

To limit the passive fingerprinting of users, Google is reducing components of the UA strings in their Chromium browsers and introducing Client Hints. When there is a trusted relationship between first-party domain owners and third-party servers, Client Hints can be used to share the same data.
This transition began in early 2022 with bigger expected changes beginning in February 2023. You can see in the above example, Chrome/109.0.0.0, where browser version information is already no longer available from the UA string on this desktop Chrome browser.
How can you use User-Agent device attributes today?
UA string information can be used for a variety of reasons. It is a component in web servers that has been available for decades. In the AdTech space, it can be used in various ad targeting use cases. It can be used by publishers to better understand their audience. The shift to limit access and information shared is to prevent nefarious usage of the data.
What are the benefits of Client Hints?
By using Client Hints, a domain owner, or publisher, can manage access to data activity that occurs on their web properties. Having that control may be advantageous. The format of the information shared is also cleaner than parsing a string from User-Agents. Although, given that Client Hints are not the norm across all browsers, a long-term solution may be needed to manage UA strings and Client Hints.
An advantage of capturing and sharing Client Hint information is to be prepared and understand if there is any impact to your systems and processes. This will help with the currently planned transition by Google, but also should the full UA string become further restricted.
Who will be impacted by this change?
Publishers across the open web should lean in to understand this change and any potential impact to them. The programmatic ecosystem supporting real-time bidding (RTB) needs to continue pushing for adoption of OpenRTB 2.6, which supports the passing of client hint information in place of data from UA strings.
What is Google’s timeline for implementing Client Hints?

Do businesses have to implement Client Hints? What happens if they don’t?
Not capturing and sharing with trusted partners can impact capabilities in place today. Given Chromium browsers account for a sizable portion of web traffic, the impact will vary for each publisher and tech company in the ecosystem. I would assess how UA strings are in use today, where you may have security concerns or not, and look to get more information on how to maintain data sharing with trusted partners.
We can help you adopt Client Hints
Reach out to our Customer Success team at tapadcustomersuccess@experian.com to explore the best options to handle the User-Agent changes and implement Client Hints. As leaders in the AdTech space, we’re here to help you successfully make this transition. Together we can review the options available to put you and your team on the best path forward.
About our expert

Nate West, Director of Product
Nate West joined Experian in 2022 as the Director of Product for our identity graph. Nate focuses on making sure our partners maintain and grow identity resolution solutions today in an ever-changing future state. He has over a decade of experience working for media organizations and AdTech platforms.
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As Earth Day approaches, it’s the perfect opportunity for marketers to explore innovative ways to engage with eco-conscious customers. With a strong and growing interest in sustainable business practices worldwide, green audiences are becoming increasingly influential. In addition to being good for the planet, engaging these customers is great for any brand or organization striving to become more eco-friendly and socially responsible. By taking advantage of this timely event and using appropriate tools, you can create personalized campaigns that will both promote your brand and increase customer loyalty. Eco-conscious audiences In this blog post, we'll cover three eco-conscious audiences to target this Earth Day: Solar energy GreenAwareTM Electric vehicles Solar energy Our first eco-conscious audience is Solar energy. Consumers in this audience show an inclination toward harnessing the power of the sun as a clean, renewable energy source. Our audience data can provide valuable insights into the Solar energy consumer base, including their age, education level, occupation, household income, and communication preferences. Let's explore these metrics to better understand how to reach this group effectively. Age and living situation Consumers in our Solar energy audience are more likely to live in a home with two or more adults and are between the ages of 45-74. Education level and occupation Consumers in our Solar energy audience are more likely to have graduated from college or graduate school and work in management-level occupations. Household income Consumers in our Solar energy audience have household incomes of more than $75,000 and their homes are valued at over $550,000. Preferred engagement channels Consumers in our Solar energy audience are most receptive to ads served through digital channels like digital newspapers and email. Solar energy audience pairings Consumers in our Solar energy audience also belong to three of our Mosaic® USA groups: Power Elite Flourishing Families Booming with Confidence Our consumer segmentation portal of 126 million households and 650 lifestyle and interest attributes empowers marketers like you to precisely target your ideal audience and communicate with them on a personal level. Mosaic’s data segments the U.S. into 19 overarching groups and 71 underlying types, giving you the insights needed to anticipate the behavior, attitudes, and preferences of your most profitable customers and communicate with them on their preferred channels, with messaging that resonates. Learn more about Mosaic GreenAware Our second eco-conscious audience is GreenAware. GreenAware segments the 126 million U.S. households within Consumer View into four distinct groups. Each group differs in their attitudes and behaviors toward purchasing products that are environmentally safe and working with companies that are eco-conscious. We created these groups using an enhanced application of traditional statistical clustering techniques based on environmentally relevant measurements in Simmons' National Consumer Study. Based on the distinctive mindset of consumers toward the environment, you can learn how environmental concerns fit into their lives through four major consumer segments: Eco-Friendly Enthusiasts Sustainable Spectators Passive Greenies Eco Critics Let's dive deeper into each group to understand their unique perspective on the environment and how this impacts their attitudes and behaviors. Eco-Friendly Enthusiasts This eco-conscious segment prioritizes a green lifestyle and takes pride in avoiding products that harm the planet. With traditional and liberal values, they embrace optimism and prioritize family. With their children out of the house, they take the time for some well-deserved rejuvenation and are committed to a healthy lifestyle. Some members of this group are transitioning into retirement and welcoming a new chapter in their life. Mature adults and retirees College graduate or more Above average income May be married or single Typically own their homes Sustainable Spectators This segment aspires to be more sustainable, but they struggle with translating their green ideas into action. They have a soft spot for a cozy home. While their love for interior design and taking care of their own space is evident, they're always looking for new experiences and opportunities to learn. Staying healthy and active is a top priority for this group, so it's no surprise that they're always looking for ways to stay fit and feel their best. Established and mid-life adults College graduate or more High income Typically married Likely to own their homes Passive Greenies This is the largest and one of the most youthful groups. Known for their love of exploration and self-discovery, they may not have fully embraced eco-conscious behaviors yet, but they are eager to stay current with the latest technology and trends. With their incredible ability to multitask, they're always on-the-go, and constantly seek the next best thing. Mainly young adults and diverse Education ranges from high school through some college Below average income More likely to be single or divorced Typically rent Eco Critics This group is not likely to be eco-conscious and may have negative attitudes about the environment. They are confident, driven, and focused on their personal growth. They crave instant gratification, seeking out quick and easy solutions to their everyday decisions. They place a high value on entertainment, their social life, and carefully curate their image. Young and established adults Education ranges from high school through post-graduate studies High income Married or single Typically own their homes Let's take a look at how the GreenAware segments stack up against each other in terms of age, household income, education level, and media preference. How do they compare? Let's find out. Age Consumers in the Eco-Friendly Enthusiasts segment are the oldest of the four GreenAware segments – about half of the consumers are 65 or older. Eco Critics are the youngest segment, with over half of consumers in this group between ages 25-44. Household income Sustainable Spectators and Eco Critics are the wealthiest GreenAware segments. The average household income of consumers in these segments is above $100,000. Passive Greenies have the lowest household income, with a majority below $50,000. Education level and occupation Passive Greenies are more likely to work Blue Collar jobs and have the lowest level of education. As the wealthiest segments, Sustainable Spectators and Eco Critics have the highest levels of college degrees and work in management, business, and financial operations. Eco-Friendly Enthusiasts are the most likely to be retired and out of the workforce. Preferred engagement channels Streaming TV is the preferred engagement channel for all GreenAware segments. Eco-Friendly Enthusiasts prefer digital channels like digital newspapers, mobile SMS, and email. They also engage with traditional channels like direct mail and newspaper. Passive Greenies have a high preference for digital display, mobile SMS, digital video, broadcast cable TV, and radio. Eco Critics have a high preference for digital channels like digital newspapers, mobile SMS, and digital display. Sustainable Spectators strongly prefer digital newspapers. They don't show as strong of a preference for mobile SMS and digital display as Eco Critics and Passive Greenies. GreenAware audience pairings Six of our Mosaic groups have at least one GreenAware segment with 10% or more of the population. For more precise targeting, below are suggested Mosaic audiences you can pair with each GreenAware segment: Eco-Friendly EnthusiastsSustainable SpectatorsPassive GreeniesEco CriticsBooming with ConfidencePower EliteSingles and StartersPower EliteAutumn YearsBooming with ConfidenceGolden Year GuardiansSuburban StyleGolden Year GuardiansSingles and Starters Electric vehicles Our third eco-conscious audience is electric vehicles. Electric vehicles (EVs) are having a major moment in the automotive industry. This is no surprise given that new EV models are being released and an increasing number of charging stations are popping up around the country. As EVs become more prominent, it's essential to stay up to date on relevant trends to make informed decisions about what lies ahead. The demand for electric vehicles (EVs) is on the rise Consumers are embracing the EV revolution, showing their desire for a cleaner, greener future. Automotive marketers are increasingly looking to reach in-market EV shoppers and current alternative fuel vehicle owners due to the growing availability of electric vehicles, improved infrastructure, and rising popularity. In 2022, EVs charged up the market and accounted for a remarkable 6% of new retail registrations. While Tesla continues to dominate the EV market, Ford, Chevrolet, and Hyundai are starting to compete, each holding more than 3% of the market share of new retail EV registrations. Geography Where are we seeing the most new retail EV registrations? The top designated market areas (DMAs) for new retail EV registrations are mostly located in heavily populated, coastal cities like Los Angeles, CA and New York, NY. The fastest growing DMAs, however, are in smaller cities like Tucson, AZ and Oklahoma City, OK. Generational demographics Gen X and Millennials make up the largest percentage of new retail EV buyers at 37.5% and 34.4%. Gen Z and the Silent generation represent the smallest shares at 5% and 2.1%. Boomers hover between Gen X and Millennials' share and account for 20.6% of new EV retail purchases. EV audience pairings Our top five Mosaic groups for new EV buyers include: American Royalty Cosmopolitan Achievers Philanthropic Sophisticates Couples with Clout Fast Track Couples How to target consumers in-market for electric vehicles We offer 70+ audiences that are focused on likely buyers and owners of EV and plug-in hybrid (PHEV) vehicles. We also offer a subset of 28 audiences focused on individual EV/PHEV vehicle models. Below is how you can find a few of these audiences on-the-shelf of most trusted advertising platforms: Autos, Cars, and Trucks > In Market-Fuel Type > Electric Autos, Cars, and Trucks > In Market-Fuel Type > Used Electric Autos, Cars, and Trucks > In-Market Make and Models > Tesla Autos, Cars, and Trucks > In-Market Make and Models > Chevrolet Bolt EV We can help you reach eco-conscious consumers Earth Day is a great opportunity to get creative with your marketing efforts with our three eco-conscious audiences: Solar energy, GreenAware, and electric vehicles. To find out how you can add eco-conscious audiences to your marketing plan, contact us. Get started today Latest posts

Advertisers are always looking for ways to improve the targeting and effectiveness of their campaigns. One strategy that's gaining popularity lately is using curated private marketplace (PMP) deals, allowing advertisers to buy premium ad inventory in a private auction environment. But how do data providers and PMPs work together to make PMP advertising more successful? What is a private marketplace (PMP)? Advertising PMPs, or private marketplace deals, are a type of programmatic advertising where advertisers and publishers negotiate and set up a direct deal between themselves to buy or sell advertising inventory in a private auction environment. In PMP deals, publishers can make their premium inventory available to a select group of advertisers, who can bid on it in a private auction using demand-side platforms (DSPs). These private auctions typically offer higher-quality inventory and a more targeted audience than open exchange auctions, which are accessible to all advertisers. However, traditional PMPs had their limitations, including often being limited to accessing inventory from a single publisher group. Audigent takes PMP advertising to the next level with SmartPMPs Audigent's key differentiator is that instead of activating audience data from the DSP, which is the industry standard, they integrate directly with supply-side platforms (SSPs). By taking this route, audience data and inventory from hundreds or even thousands of publishers can now be packaged together into a single deal ID / SmartPMP. SmartPMPs empower media buyers with the ability to access and buy against unique, customizable data segments on premium curated publisher inventory in combinations that otherwise would not have been available. Activating data via the supply-side also enables supply-side optimizations. This means that instead of simply being a data provider, Audigent plays an active role in the success of media buyers' programmatic campaigns by optimizing toward performance goals in coordination with demand-side buyers. The result is the full alignment of demand- and supply-side technologies for the first time in programmatic. SmartPMPs drive campaign performance Audigent performance data compared to the programmatic open exchange: How Experian and Audigent partner in PMP advertising Experian and Audigent collaborate using Consumer View audience data. By supplying valuable insights into users' interests, behaviors, and demographics, we help advertisers create more targeted and personalized ad campaigns with Audigent. This can lead to higher engagement rates, greater brand awareness, and increased conversions for Audigent and Experian clients. By activating Experian data via Audigent SmartPMPs, advertisers unlock the ability to reach highly engaged users across premium, curated inventory sources on key channels like connected TV (CTV), display, video, and more. Unlock the potential of programmatic advertising with us Our strategic collaboration with Audigent is transforming the programmatic advertising space. Our partnership enables our customers to tailor their ads directly to their desired audience. This elevated personalization results in higher conversion rates and optimized campaigns for superior ROI performance. Contact us for more information about our digital audience segments on the Audigent platform. To learn more about our partner Audigent, visit www.audigent.com. Contact us Latest posts

A successful back-to-school campaign strategy starts with identifying the key audience segments to target. Over half of all searches related to back-to-school happen within a select group of consumers – knowing which ones can go a long way in forming an effective marketing strategy. Focus on this smaller, targeted set to maximize your efforts. With over $72 billion projected in total U.S. back-to-school retail sales this year, you can capture more spend than ever before during this big shopping season by tailoring your strategy to a smaller set of targeted shoppers. Experian data can help you make the most of your back-to-school campaigns by uncovering the top five back-to-school audiences. Five audience segments for 2023 Our data provides key insights into who these shoppers are and how to reach them, allowing you to create personalized content tailored to their needs. What are the top five audiences you should add to your 2023 back-to-school campaign? High-Net-Worth Households Bilingual Multi-Generational Households Suburban Savvy Shoppers Young Suburban Families Tech-Savvy Families What do these audiences look like? Who are they? Where do they shop? Let's review each audience in a little more detail. High-Net-Worth Households This group consists of households with above-average income and education levels. They often lease luxury cars, purchase products in every channel, travel extensively, and are philanthropic supporters of the arts. Key features Wealthy Highly educated Lease luxury cars Purchase products in every channel Travelers Philanthropic supporters of the arts Bilingual Multi-Generational Households Large households in multilingual neighborhoods, filled with married parents and their kids. They are financially cautious, bilingual, and participate in team sports. Key features Bilingual Large households Married with kids Financially cautious Team sports Suburban Savvy Shoppers Middle-aged couples and families who earn above-average incomes, maintain active lifestyles, and spend their money on quality home products and furnishings. Key features Affluent Athletic activities Home products & furnishings Sporting goods High-priced children’s clothing Young Suburban Families This segment includes households in the middle child-rearing stages of life, typically with a dual income household and multiple children of school age. They typically have spacious single-family residences in suburban neighborhoods that are slightly above average in housing values. On weekends, these suburban young families often engage in activities like skateboarding, biking, and video games with their children. Key features Comfortable lifestyle Children’s games Wholesale members Family-centric activities Tech-Savvy Families Highly educated, affluent couples in their peak earning years, with a preference for both traditional and digital media, who live in upscale housing and are savvy investors and environmental philanthropists. Key features Highly educated Affluent Upscale housing Savvy investors Environmental philanthropists Tech apprentices Watch our 2024 video for tips from industry leaders for back-to-school In our new Q&A video with Experian experts, we explore changing consumer behaviors surrounding back-to-school shopping in 2024. In the video, we discuss: Anticipated shifts in consumer behaviors and shopping habits Tactics we predict marketers will employ to navigate signal loss Which channels will be the most successful And more! Watch now Latest posts