Synthetic personas: helpful or harmful?
Long Read

This post was written October 2024
The arrival of publicly accessible Artificial Intelligence has opened both new opportunities and challenges.
One of the more recent tools that have hit the branding, marketing, and advertising sectors is Synthetic Personas, aka virtual personas. In this article, we discuss if they are any good and the relevance and quality of these AI-generating tools.
Understanding your audience is seemingly easier than ever if you are creating or managing a brand. A trail of reviews, comments and subtle recommendations guides our every online interaction. A record of many human interactions is available on social media. If you’re conducting large-scale surveys or feedback, getting the data be that Quant (numbers-based) or Qual (behaviour-based), used to be costly; today, it’s much easier with online tools.
With ever-increasing amounts of data swilling around, filtering through the volume of data and building up accurate audience personas can be a time-consuming challenge. However, scraping succinct summaries from available information is catnip to machine learning, and AI start-ups have stepped in to make the whole process easy and instantaneous. A number of online tools allow you to (after providing them with significant audience data) not just create detailed synthetic personas – but then to ‘interview’ them to get their opinions on brands, test product ideas, or get a sense of the competitive landscape.
We’ve tried a number of them, and the results are helpful. They can be surprisingly accurate in terms of defining many of the pragmatic aspects of a persona. They can quickly draw up pen portraits and reveal information that might be difficult to discover without deeper research into your data.
Once defined by AI and then checked and edited by a human, the ability to use them as a virtual sounding board gets interesting, especially if it’s difficult to speak directly to potential customers or clients. As Michelle Greenwald notes in her Forbes article, “Synthetic personas, powered by the latest LLMs from Google and Open AI mimic the sensibilities of real human personas and can help brands test and optimise creative for different target audiences, reduce backlash risk, and potentially increase the chances campaigns will go viral”.
Synthetic personas, powered by the latest LLMs from Google and Open AI mimic the sensibilities of real human personas and can help brands test and optimise creative for different target audiences, reduce backlash risk, and potentially increase the chances campaigns will go viral.
However, there is still an underlying feeling that you are essentially interviewing a machine. And that’s the main problem with synthetic personas; there’s a sense that they lack the randomness of a real human subject — and that’s potentially problematic as randomness is inherent in how we think, interact and behave.
Anyone who’s sat in on focus groups or customer interviews will appreciate that what’s unsaid is often as important as what’s actually discussed and that people’s opinions shift greatly depending on the context, the direction of the conversation or even who else is in the room. For example, although lots of research shows that the majority of millennials declare that their purchase decisions are driven by sustainability; data reveals that the vast majority buy based on a far simpler metric: price.
It’s not just the weirdness and contrariness of humans that plays a key factor in defining personas and undertaking research. The uncertainty of culture also plays an enormous effect on how we behave or what we believe. When we take into account unforeseen shifts and the adoption of trends from far outside the mainstream conversation, it’s clear that brands exist in a world that is not only chaotic, it often bears little resemblance to what’s gone before.
Recent high-profile missteps by major brands illustrate this challenge (Greenwald cites examples such as Apple’s Crush! iPad Pro campaign and Bumble dating app’s anti-celibacy advert). These campaigns — despite presumably being vetted through traditional channels of research — resulted in significant backlash and public apologies from the companies involved.
If we struggle to do this with real humans, can we expect synthetic personas to be the same or any better?
Could the synthetic persona of a young female graduate accurately convey the emotional need to feel a sense of belonging in their first job? Or the self-sacrifice of accepting a role in a company that’s not entirely ethical, but well paid? Or the wider impact the Me Too movement might have on their career? These nuanced scenarios highlight the complexity of human decision-making and emotional responses.
Although synthetic personas use behavioural data, psychographics, and predictive analytics, synthetic personas are only as good as the data you use. If your data is outdated or inaccurate, your personas will reflect that too. The question is understanding how much they are up to date with trends, real world movements and the removal of the human quirk of being random and acting unexpectedly. People in the UK loving the name Boaty McBoatface is a prime example of what I felt was just plain bonkers solution – a wild card you could not have predicted!
We all know what Henry Ford thought his customers would have wanted should he have asked them (faster horses)* – based on the available knowledge at the time, he was probably right.
Whether any synthetic persona could make a leap of imagination to suggest a credible solution outside the conventional data remains to be seen.
However, advancements in AI-driven persona testing are showing promise. Greenwald describes how companies like RehabAI are developing sophisticated tools that combine “demographic, contextual behavioural, and engagement and interaction data” to create more nuanced and predictive synthetic personas. These tools can provide valuable insights at various stages of the creative process, potentially helping brands avoid costly missteps.
For instance, when RehabAI tested Apple’s iPad Crush! ad, they uncovered a range of reactions from synthetic personas that mirrored real-world feedback. One persona, “Maria (F, 32)” was “Impressed by the visuals but found the message confusing, questioning the link between destruction and the iPad”. This kind of early feedback could have helped Apple refine their message before launch but, equally, why did a real human in testing not mention this?
Despite these advancements, it’s crucial to remember that synthetic personas are tools, not replacements for human insight. Tim Rodgers, founder of RehabAI, points out in an article for Forbes – “by the time human testers are involved, the creative content has already been vetted through extensive AI testing, making the human feedback stage more efficient and focused” However, the risk here is that great ideas that could unexpectedly resonate with an audience could end up on the cutting room floor as, after analysing data, a digital tool said it wasn’t right.
In conclusion, while synthetic personas offer exciting possibilities for streamlining market research and creative testing, they should be viewed as complementary to traditional methods. The challenge for marketers is to harness the efficiency and scalability of AI-driven tools whilst maintaining the human touch that captures the true complexity of consumer behaviour.
As technology continues to evolve, finding this balance will be key to creating engaging brands and campaigns that resonate authentically with audiences and avoid potential pitfalls.
*There is some debate as to whether Ford actually said this, but the point is so valid it’s become accepted wisdom.
Other insights by Vicki
About Vicki Young
Vicki Young (she/her) is Founder and CCO of Nalla. After working for two of the most respected creative agencies within the industry, she set up Nalla as a tribute to her late father, Allan.
A thought-leader in the branding space, Vicki’s insights are regularly featured in publications such as The Times, Creative Review and Transform Magazine.
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