Experian received top ranks for hashed emails (HEMs) and demographic data from Truthset Data Collective

Advertisers, technology partners, and agencies are all chasing accurate data to power their marketing strategies. Turns out, not all data is created equal and unless you’re working with the right partner, high-quality data can be hard to find. That’s because accuracy can vary widely across the industry and the partner you choose is important. A recent study conducted by data validation company Truthset showed that 51% of the data used for ad targeting and audience measurement is wrong, with average accuracy rates ranging between 32%-69% across data providers.
The data quality challenge
The lack of high-quality data poses multiple challenges in the advertising world:
- Wasted ad spend: without accurate data at the start, marketers can’t reach the right audiences, resulting in wasted impressions.
- Privacy and compliance: in an increasingly privacy-centric world, advertisers need to be especially mindful of accurate targeting to avoid putting their brand reputation at risk.
- Poor campaign performance: low-quality data skews metrics and attribution models, making it difficult to measure campaign success and optimize spend.
Low-quality data can come in different forms like inconsistent or outdated information – think demographics (age, gender) and interests (dog versus cat lover) or simply the wrong relationship can be made between datasets. Data records can be incomplete or duplicative and data segments could be misclassified or inaccurate. For example, a kids snack food company may think they’re targeting a 35-year old man, who lives in the suburbs with his young family when in fact it’s a 65-year-old woman who moved to the city after her kids went to college. It’s wasted dollars!
Build the data foundation
Data quality needs to be addressed if advertisers and advertising technology partners want to fulfill consumers’ demand for personalized marketing. Per eMarketer, more than 75% of internet users worldwide said they were willing to share their email address, brand interest, and name in exchange for personalized experiences. Without accurate data, marketers won’t be able to provide the level of personalization that consumers desire.
Validation can help advertisers evaluate third party data and help build trust across the ecosystem. Companies like Truthset review and provide an unbiased evaluation of data fidelity and quality on a regular basis.
“As cookies and mobile ad identifiers continue to phase out, consented, durable identifiers (hashed email, postal addresses) are going to serve as the foundation for identity solutions of the future,” said Chip Russo, President at Truthset. “And the only way to ensure you are transacting on the highest quality identity and demography data is to actively validate the data you rely on with a third party.”
Not all data is created equal: Experian leads the way
In Q3 2023 Truthset reviewed Experian’s marketing data – as well as several other large data providers – and found:
- Experian is the #1 data provider in terms of largest volume of high-accuracy hashed e-mails (HEMs) with demographic data
- Experian ranks #1 in accuracy for 15 marketing data attributes, including but not limited to Age, Gender, Home Owner/Renter, Geography, Education, Presence of Children, and Pet Owner
- Experian consistently has the largest number of HEMs with demographic data that are 90% or more likely to be accurate
“As a member of the Truthset Data Collective, Experian received top ranks across a variety of categories for its data,” continued Russo. “The entire digital advertising world runs on data, but focusing on data accuracy is going to drive the next phase of innovation for the industry, enhancing ROI for advertisers, CPMs for publishers, and relevant experiences for consumers.”
As Truthset’s recent study highlights, the data matched between hashed e-mails and postal addresses is crucial, underpinning everything from targeted ads to TV audience measurement. Highly accurate HEMs linked to high-quality demographic data should be the foundation of any marketing plan. Advertisers are able to overcome the complexities of identity resolution by tying online and offline touchpoints together to deliver a consistent message across channels.
Companies are striving to eliminate marketing waste and provide consumers with personalized marketing and the advertising industry can have confidence that Experian’s marketing data has been externally validated as being highly accurate. The accuracy of our data will power smarter marketing initiatives, like insights, targeting, identity, and measurement.
Let’s start a conversation about how we can fully realize the potential of data-driven advertising together.
Latest posts

According to Epsilon Targeting’s latest Consumer Channel Preference Study of 5,000 consumers in North America, 60% of consumers report an "emotional boost" from receiving direct mail, agreeing that they enjoying checking their mailbox. This report showed that across all categories, direct mail continues to be a trusted source of information. It's always good to reach out to consumers via email, but the disadvantage to this is that the consumer has the ability to receive emails from you on their own terms, which may be infrequent or not at all. The use of direct mail has shown to be a pleasing emotional hook. Even with the ever growing digital world, consumers are still responding to your direct mail pieces. Don't let your businesses address contact data fall to the wayside – this is still just as important as ever to have. To ensure as timely delivery, make sure you're using address validation tools to make sure you're saving money and getting the most out of your direct mail campaigns.

The NCAA basketball tournament tipped off this week much to the delight of fans across the United States. Supporters who have truly caught March Madness often follow more than one game at a time, especially during the first week of the tournament play. Thanks to simulcast streaming of games online and via mobile apps, die-hards are better equipped to keep track of multiple games at once. Those who stream games online live in every corner of the country, but some locales are more likely to log on for their March Madness fix than others. According to Experian Simmons, you are most likely to be streaming the game online if you live in one of these markets:

The social media space continues to evolve. Pinterest, a site launched in March 2010 that describes itself as an online pinboard to organize and share things you love, recently emerged as one of the top 10 websites within the Hitwise Social Networking & Forums category. The invitation only site received nearly 11 million total visits during the week ending December 17, 2011, almost 40 times the number of total visits versus just six months ago (week ending June 18, 2011). Pinterest content has something for everyone, but the site is dominated by images featuring home décor, crafts, fashion, and food. Not surprisingly, visitors to the site in the 12 rolling weeks ending December 17th skewed female (58%) and between the ages of 25 and 44 (59%). Pinterest and the Social Networking & Forums category both receive their highest share of visits from California and Texas. However, the Social Networking category as a whole over-indexes on share of visits from Northeastern states while Pinterest over-indexes on visits from the states in the Northwest and Southeast. This data indicates that Pinterest visitors have a different profile versus their counterparts visiting other social networking sites such as Facebook and YouTube. In fact, nine of the top ten over-indexed states for Pinterest visitors also over-index for the Hobbies and Crafts category (versus the online population) which is expected given the abundance of crafts content on the website. When comparing the Mosaic USA 2011 types that visit both Pinterest.com and Hobbies and Crafts websites during the 12 weeks ending December 17, 2011, the data shows that Boomers and Boomerangs are the group most likely to visit, particularly the Pinterest website (comprising over 10% of visits). This group of consumers is characterized as baby boomers and young adults who are heavy web users who spend time on house and garden, sports and fitness, and family-oriented websites. This information is useful to companies who wish to target their content to be “pinned” by Pinterest users. Thanks to Lauren Rice, an Analyst with the Strategic Services team at Experian Hitwise for today's analysis.