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.
Get in touch
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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With Tapad, part of Experian, technology, AdsWizz AudioMatic is the first Audio buying platform to offer cross-device identity resolution across the U.S. and EMEA NEW YORK and LONDON, July 17, 2019 /PRNewswire/ — Tapad, part of Experian and a global leader in digital identity resolution, today announced a new joint capability with AdsWizz , the leading technology provider for digital audio advertising solutions. The partnership combines Tapad's digital cross-device technology with AdsWizz's AudioMatic buying platform, enabling the ability to connect audio ad experiences across screens. AudioMatic, AdsWizz's audio-centric buying platform, supports programmatic audio buying and entirely new audio ad experiences for listeners. The integration of The Tapad Graph onto its platform enables new opportunities for marketers to reach, engage and measure each interaction with their desired consumers on digital radio and podcasts channels, and across devices. This partnership makes AdsWizz the first audio buying platform to offer this enhanced cross-device identity capability in the US and EMEA markets. "Marketers need privacy-safe digital identity resolution to reach their consumers," says Tom Rolph, VP of EMEA at Tapad. "With audio becoming an increasingly powerful medium for engagement, it's important that our technology extends to this channel, which is why we are excited to announce our integration with AdsWizz's AudioMatic platform." Digital audio is experiencing high growth, with 84% of advertisers and agencies saying it will play a bigger role in their media plans in the future. Today, 60% of digital audio is consumed via a mobile device.* The Tapad Graph is the largest digital identity resolution graph with differentiated global scale. The partnership enables audio advertisers to leverage The Tapad Graph for enhanced attribution, analytics, and targeting. Alexis van der Wyer, CEO at AdsWizz, added, "Digital audio is increasingly becoming ubiquitous in our media consumption and in our daily digital interactions, and because of that, audio advertising offers tremendous opportunity to personally interact with consumers in every moment of their daily lives. By integrating with Tapad, we enable our advertising partners to increase the effectiveness and the relevance of their marketing messages across audio channels." To learn more about Tapad and our digital identity resolution products, visit our identity solutions page. *Digital Audio Exchange, "The Rise of Digital Audio Advertising," https://thisisdax.com/wp-content/uploads/2019/07/DAX-Whitepaper.pdf About Tapad Tapad, Inc. is a global leader in digital identity resolution. The Tapad Graph, and its related solutions, provide a transparent, privacy-safe approach connecting brands to consumers through their devices globally. Our one-of-a-kind Graph Select offering enables marketers the flexibility and freedom of choice to correlate devices to varied objectives, driving campaign effectiveness and business results. Tapad is recognized across the industry for its product innovation, workplace culture and talent, and has earned numerous awards including One World Identity's 2019 Top 100 Influencers in Identity Award. Headquartered in New York, Tapad also has offices in Chicago, London, Oslo, Singapore and Tokyo. About AdsWizz: AdsWizz has created the end-to-end technology platform that is powering the digital audio advertising ecosystem. AdsWizz powers well-known music platforms, podcasts and broadcasting groups worldwide with a comprehensive digital audio software suite of solutions that connect audio publishers to the advertising community. From dynamic ad insertion to advanced programmatic platforms to innovative new audio formats, AdsWizz efficiently connects buyers and sellers in digital audio. AdsWizz is headquartered in San Mateo, California, with an IT Development hub in Bucharest, Romania, and presence in 39 markets around the world. About AudioMatic: AdsWizz Demand Side, audio-centric DSP and audio buying platform, AudioMatic, enables programmatic audio buying and entirely new audio ad experiences that are proven to be more engaging and more effective, and have delivered measurable results for agencies and their brands all over the world. All the biggest ad agencies have used our programmatic trading platform, including Omnicom, GroupM, Havas, Publicis, Mobext, and more. Contact us today