Persona Creation: Why Most Marketers Build the Wrong Picture

Persona creation is the process of building semi-fictional profiles of your target customers, grounded in real data and behavioural research, to guide decisions across messaging, channel selection, product positioning, and go-to-market planning. Done well, it sharpens everything downstream. Done badly, it produces laminated posters of fictional people named “Marketing Mary” that get pinned to office walls and ignored within a week.

Most personas fall into the second category. Not because marketers lack effort, but because they confuse the output with the work. A persona document is not the goal. Understanding your customer well enough to make better decisions is the goal. That distinction changes how you approach the whole exercise.

Why Most Persona Work Produces the Wrong Output

I have sat in a lot of persona workshops over the years. The format is usually the same: a facilitator draws a template on a whiteboard, someone writes a name and an age in the top corner, and then the room spends two hours projecting their assumptions onto a fictional character. By the end, you have a persona that reflects the team’s beliefs about the customer rather than the customer’s actual behaviour.

This is the foundational problem. Persona creation is treated as a creative exercise when it is a research exercise. The whiteboard session is where you synthesise findings, not where you generate them. If you have not spoken to customers, analysed purchase data, or reviewed behavioural signals before you walk into that room, you are not building a persona. You are writing a short story about someone who does not exist.

The consequences are real. Messaging gets calibrated to resonate with the internal team rather than the actual buyer. Channel investment follows assumptions about where “people like this” spend time rather than where this specific audience actually converts. Campaigns launch with confidence and underperform without anyone connecting the failure back to the bad brief that started with a bad persona.

I have seen this play out across industries. Early in my career, running a brainstorm for a major drinks brand, the room was full of smart people generating ideas based on a customer profile that had been assembled in a meeting room by people who had not spoken to a consumer in months. The ideas were creative. Some of them were genuinely good. But they were built on a foundation of assumption, and that is a fragile place to build anything.

What a Persona Actually Needs to Answer

Strip away the template fields and the stock photo placeholders, and a useful persona needs to answer three questions clearly. What problem is this person trying to solve? What does a good solution look like from their perspective? And what would prevent them from buying, even if they wanted to?

Everything else is context. Age, job title, income bracket, the name you give them: these are useful for keeping the profile human and memorable, but they are not the substance. A 45-year-old head of procurement and a 32-year-old operations manager might share identical buying motivations if they are both trying to reduce supplier risk in a category where they have been burned before. The demographic difference is irrelevant to the message. The shared anxiety is everything.

This is why the best persona frameworks are built around decisions rather than descriptions. The question is not “who is this person?” but “how does this person decide?” That reframe changes what you look for in research, what you include in the profile, and how the profile gets used in practice.

For teams working across go-to-market planning, this connects directly to the broader strategic work. Persona creation does not live in isolation. It sits inside a larger framework of market definition, positioning, and channel strategy. If you are building or refining your go-to-market approach, the Go-To-Market & Growth Strategy hub covers how these components fit together across different business contexts.

Where the Research Actually Comes From

Good persona research has three reliable sources: direct customer interviews, behavioural data, and sales team intelligence. Each gives you a different layer of the picture, and you need all three to avoid blind spots.

Customer interviews are the most valuable and the most neglected. Talking to eight to twelve customers who represent a specific segment will surface motivations, language, and objections that no amount of analytics data can reveal. The goal is not to ask them what they want. It is to understand the problem they were trying to solve before they found you, what they considered, what made them hesitant, and what tipped the decision. Those answers are the raw material of a useful persona.

Behavioural data tells you what people do rather than what they say. Site analytics, purchase patterns, content engagement, and conversion path analysis all reveal how different segments actually behave, which is often different from how they describe their own behaviour in interviews. Tools that track on-site behaviour can surface friction points and preference signals that customers themselves cannot articulate. This kind of data is a useful corrective to the narrative people construct about their own decision-making.

Sales team intelligence is underused in persona work. The people who have had hundreds of conversations with prospects carry a significant amount of pattern recognition about objections, buying triggers, and the language customers use to describe their problems. That institutional knowledge rarely makes it into a formal research process. It should. A structured debrief with two or three experienced salespeople will often surface more actionable insight than a formal research project that takes three times as long.

The combination of these three sources gives you something you can actually defend. Not because it is statistically representative, but because it is grounded in real signals rather than internal projection.

The Baseline Problem Nobody Talks About

One of the more persistent problems in persona work is that teams declare success too early. They build a persona, run a campaign against it, see an improvement in performance, and conclude the persona worked. What they often do not account for is the baseline they were working from.

I have seen this in performance marketing specifically. A vendor once presented results showing a significant reduction in cost per acquisition after introducing more targeted creative, attributed to better audience understanding. When I pushed on what had changed, it turned out the previous creative was genuinely poor. The new creative was better, but it was not dramatically better. The performance improvement came from raising a very low floor, not from any particular insight about the audience.

The same logic applies to personas. If your previous messaging was generic and your new persona-informed messaging is at least specific, you will see improvement. That improvement tells you specificity matters, which is useful. But it does not validate the persona itself. The persona might still be wrong in ways that will only become apparent when you try to scale or enter a new segment.

This is why persona work needs to be treated as an ongoing process rather than a one-time deliverable. The first version is a hypothesis. You test it, you see where it holds and where it does not, and you refine it. Organisations that treat the initial persona document as the finished product are setting themselves up for a slow drift away from their actual customer as markets evolve and buyer behaviour shifts. Forrester’s research on go-to-market struggles in complex categories consistently points to audience misalignment as a root cause of commercial underperformance, and persona drift is a significant contributor to that misalignment.

How Many Personas Do You Actually Need

The answer is almost always fewer than you think. There is a tendency in larger organisations to build persona libraries. Eight personas, twelve personas, sometimes more, each representing a slightly different slice of the audience. The intention is thoroughness. The result is paralysis.

When I was growing an agency from around twenty people to close to a hundred, one of the things that became clear early on was that having too many customer segments made it impossible to make clean decisions about positioning, service development, or new business targeting. We kept finding reasons to pursue every opportunity because we had a persona that justified it. That is not strategic clarity. That is a sophisticated way of avoiding prioritisation.

Two or three well-constructed personas, each representing a meaningfully different buying pattern or decision context, will serve most businesses better than a comprehensive library of profiles that nobody can hold in their head simultaneously. The test of a useful persona is whether someone can recall its key characteristics without looking at the document. If the profile requires a reference sheet to use, it is too complex to drive decisions in practice.

For B2B businesses, the picture is more complicated because buying decisions often involve multiple stakeholders. In that context, it is more useful to think about buying roles rather than individual personas. The economic buyer, the technical evaluator, and the end user may all need to be addressed, but they do not each need a fully developed persona. They need enough profile to inform how you speak to them at different stages of the buying process. BCG’s work on go-to-market strategy in financial services makes a similar point about the risk of over-segmenting audiences in ways that create operational complexity without commercial benefit.

Connecting Personas to Actual Go-To-Market Decisions

A persona that does not connect to a specific decision is a document, not a tool. The value of persona work is entirely dependent on how it gets used downstream. If the persona sits in a strategy deck and never gets referenced in a creative brief, a media plan, or a product roadmap, it has produced no commercial value regardless of how well it was constructed.

The connection points that matter most are messaging, channel selection, and offer design. On messaging, the persona should tell you what language to use and what to avoid, what the customer cares about most at each stage of the buying process, and what objections need to be addressed before a decision can be made. On channel selection, it should tell you where this type of buyer actually consumes information and at what point in their decision process they are reachable through different channels. On offer design, it should tell you what a compelling proposition looks like from their perspective, not from yours.

These connections are where persona work earns its place in the planning process. Without them, you have done research and produced a document. With them, you have a tool that shapes execution across the entire go-to-market motion. Understanding why go-to-market execution feels harder than it used to often comes back to exactly this problem: strategies that are well-constructed in isolation but poorly connected to the decisions that follow.

BCG’s thinking on brand and go-to-market strategy reinforces this point: the organisations that get the most value from customer insight are the ones that build systematic connections between research and execution, rather than treating them as separate workstreams. The persona is the bridge. It only functions as a bridge if both sides are anchored.

The Validation Step Most Teams Skip

After you have built a persona based on research and connected it to your go-to-market decisions, there is one more step that most teams skip: validation against real performance data. This is where you find out whether your persona is accurate or whether it is a well-researched hypothesis that does not quite match reality.

Validation does not require a formal research project. It requires a structured review of whether the assumptions embedded in your persona are holding up against actual customer behaviour. Are the people converting who you expected to convert? Are the objections you anticipated showing up in sales conversations? Is the messaging that should resonate based on the persona actually performing better than messaging that should not?

If the answers are consistently yes, you have a persona that is doing its job. If there are persistent gaps, the persona needs to be revised rather than defended. I have seen teams spend significant energy explaining away performance gaps rather than questioning the underlying assumptions. That is a failure of intellectual honesty that compounds over time as more decisions get built on a foundation that does not quite fit.

Market penetration strategy, which Semrush covers in useful depth, depends heavily on accurate customer understanding. If your persona is off, your penetration assumptions will be off, and your growth projections will follow. The validation step is not optional. It is the mechanism that keeps persona work connected to commercial reality rather than drifting into strategic fiction.

Growth strategy is a broader discipline than any single tool, and persona creation is one component of a larger system. If you want to see how customer understanding connects to positioning, channel strategy, and commercial planning, the Go-To-Market & Growth Strategy hub covers the full picture with the same commercial rigour applied here.

What Good Persona Work Actually Looks Like in Practice

Good persona work is quieter than most people expect. It does not produce a glossy deliverable or a workshop full of creative energy. It produces a small number of clear, specific profiles that the team can actually use, built on research that has been stress-tested against real data, and connected to decisions that matter commercially.

The profile itself should be concise. A page, maybe two. It should describe the problem the customer is trying to solve, the language they use to describe it, the criteria they apply when evaluating solutions, the objections they raise before committing, and the signals that indicate they are ready to buy. Everything else is optional decoration.

The process should involve real customers, not just internal stakeholders. It should be updated when market conditions change or when performance data suggests the profile is drifting from reality. And it should be used, consistently, in briefs, in planning conversations, and in post-campaign reviews where you assess whether your assumptions held.

That is the standard. It is not complicated. But it requires discipline at every stage: in the research, in the synthesis, in the connection to execution, and in the willingness to revise when the evidence points in a different direction. Most persona work fails not because the framework is wrong but because the discipline is missing at one or more of those stages.

Persona creation done to this standard is one of the highest-leverage activities in go-to-market planning. It is not glamorous, it does not generate impressive presentations, and it does not produce the kind of output that wins awards. But it shapes every decision that follows, and in commercial terms, that is what matters.

About the Author

Keith Lacy is a marketing strategist and former agency CEO with 20+ years of experience across agency leadership, performance marketing, and commercial strategy. He writes The Marketing Juice to cut through the noise and share what works.

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