Customer Discovery 101
At the heart of any successful Startup is a deep understanding of its customers. Customer discovery is the process of learning about your target users — their problems, needs, and behaviours — so you can build something they truly want. In plain terms, it's about getting out there and talking to people (or observing them) before you build anything. This guide will walk you through several popular customer discovery methods, each with practical tips to help you get started. The tone here is relaxed and conversational — imagine a mate in his 30s walking you through the basics over a coffee. By the end, you'll have a better sense of where to begin and what to expect from each method, so you can choose the approach that fits you best.
Customer Interviews
A one-on-one customer interview can be as casual as a friendly chat — a founder listening to a user's experience while taking notes.
Talking directly with customers is often the first thing people think of for discovery — and for good reason. Customer interviews give you rich, human insight that no spreadsheet ever will.
Find participants in your target audience. Start with people who resemble your future customer. They don't need to be the perfect persona — they just need to share the problem you're investigating.
Aim for a handful of interviews to start. You don't need to interview dozens of people. Five to eight focused conversations will surface the patterns that matter.
Keep it casual and avoid biases. Think of an interview as a guided conversation. Avoid leading questions ("Don't you hate it when…?") and don't pitch your idea — you're there to listen, not sell.
Dig deeper with follow-ups. One of the best phrases in an interviewer's toolkit is "tell me more about that." Curiosity opens up the layers people don't volunteer at first.
Create a comfortable atmosphere. People open up when they feel at ease. Start with easy small talk, thank them for their time, and be genuinely interested in their answers.
And a quick practical tip: ask for permission to record the interview, or at least to take notes. People relax once they understand what's happening with their words.
Surveys
Not everyone has time for a chat, and sometimes you want feedback from a larger group quickly. That's where surveys come in. They trade depth for breadth.
Keep it short and focused. These days, people's attention spans for surveys are short. Aim for under 5 minutes and ruthlessly cut any question that doesn't directly inform a decision.
Use simple, unbiased wording. Write questions that are easy to understand and don't lead the respondent. Avoid jargon. Avoid double-barrelled questions ("Do you find this useful and easy to use?").
Pilot test your survey. Before blasting your survey out to 100 people, test it on three or four. You'll catch confusing wording and broken logic before it costs you data.
Distribute smartly (and consider incentives). To get responses, send your survey through channels where your target audience already hangs out. Small incentives (a £5 gift card, a discount, early access) often dramatically boost response rates.
Analyse with care. Once the results are in, look for patterns in the data that align with what you're hearing in interviews. Surveys are at their best when they confirm or quantify a hypothesis you've already explored qualitatively.
Oh, and one more thing: respect people's time and privacy. If you promised a summary of findings, send one.
Focus Groups
Focus groups bring several people together at once to discuss your idea, product, or problem. They're useful when you want to see how people react to each other's views.
A focus group session in action — a small group gathered around discussing a problem or a prototype.
Keep the group small and diverse. In focus groups, less is more. Aim for around 5-7 participants who represent different angles of your target user.
Be prepared, but stay flexible. Have a discussion guide, but follow the energy of the group. The most useful insights often come from tangents.
Moderate to include everyone. In any group, some people are naturally more talkative. Your job is to draw out the quieter voices and gently keep the louder ones from dominating.
Logistics and comfort matter. Make it easy for people to participate. Choose a comfortable space (or video call setup), provide refreshments, and respect their time.
One more note: like interviews, recording a focus group (audio/video) is helpful for review afterwards. Just always ask for consent.
Usability Testing
You might be thinking, "Usability testing? I don't even have a product yet!" That's fine — usability testing works on prototypes, sketches, or even competitor products as a benchmark.
Define what you want to learn. Before you invite anyone to test, be clear on your specific questions: Is the navigation clear? Can they complete the core task? Where do they get stuck?
Recruit the right testers. Just like interviews, you want participants who resemble your target user. A test with the wrong audience tells you the wrong things.
Be a neutral observer during the test. This is critical. When the person is using your product, resist the urge to help, explain, or defend. Their confusion is your data. Watch quietly. Take notes. Ask "what are you thinking?" rather than "did you mean to do that?"
Take notes of issues and positives. As you watch, jot down not just the problems but what worked well too.
You don't need a crowd of testers. Good news — usability testing doesn't require dozens of participants. Five users will surface around 80% of usability issues. Test, learn, iterate, test again.
Side note: Even if you don't have a prototype of your own yet, you can do a form of usability testing on a competitor product to learn what works and what doesn't in the space.
Observation & Ethnographic Research
Sometimes, the best way to learn about your customer is to watch them in their natural environment. This is observation, or ethnographic research.
Plan where and what to observe. First, identify a situation that's relevant to your problem and decide what behaviours you're looking for.
Be as unobtrusive as possible. When observing, try not to interfere with the natural flow. The whole point is to see how people behave when they're not being studied.
Note details and context. As you watch, pay attention not just to what the person does, but to where, when, with whom, and what's happening around them. Context often explains behaviour.
Ask spur-of-the-moment questions (sparingly). During pure observation, you generally stay quiet. But occasionally a brief, well-timed question can illuminate something you'd never get from observation alone.
Combine observation with other methods. Often, observation is a starting point. What you see in the field becomes the basis for the questions you ask in interviews.
Introducing the GRAMS Framework
As you dive into customer discovery, especially interviews, you'll quickly realise you need a way to structure what you're learning. That's where GRAMS comes in.
Goals. What is the person ultimately trying to achieve? In other words, what's the job they're hiring a product to do?
Reality. How are they achieving that goal today? This is all about their current behaviour, the workarounds, the tools they use.
Alternatives. What alternatives have they tried (or considered)? People often have a history with this problem, and that history reveals what works and what doesn't.
Meaning. Why does this matter to them? This digs into the personal significance of the goal — and meaning is often where the real motivation lives.
Solutions. What do they wish for? Which pain points do they most want to solve?
Using the GRAMS framework as a guide, you can structure your interviews to hit all five layers and surface insights that feel cohesive rather than fragmented.
Even if you don't follow it strictly, keeping these five elements in mind will make every conversation more productive.
In Summary
In summary, customer discovery is all about staying curious and learning from real people before you commit time and money to building something. The methods above are not mutually exclusive — most teams combine two or three depending on what they need to know. Start with interviews and observation when you're early. Add surveys and focus groups when you need to validate or quantify. Bring in usability testing as soon as you have something testable.
PS. If you want to quickly master the art of the customer/stakeholder interview, check out our course.