Personas: useful applications and common pitfalls

A persona is a short, realistic description of a group of users with similar goals, behaviours and frustrations. It is a communication tool: it helps a team keep real people in mind when making decisions.

Evidence first

Useful personas come from research. They summarise patterns you saw across several participants: what they are trying to do, how they currently do it, what gets in the way, and what matters to them. A persona invented in a meeting reflects the team's assumptions, which is the opposite of what personas are for.

Behaviour over demographics

Age, job title and a stock photo feel concrete but rarely change design decisions. Behaviour does: "orders the same lunch every day and wants it in two taps" versus "explores new restaurants and reads every review". Many teams now leave out photos and names that suggest a gender or ethnicity, because these invite stereotypes and add little.

Keep the set small

Two to four personas are usually enough. Choose a primary persona whose needs you design for first. If you try to satisfy ten personas equally, you satisfy none.

Personas help teams argue about real needs rather than personal preferences. "Would Priya, who checks her balance at the bus stop, understand this?" is a better question than "Do you like this?" But personas are only as good as the evidence behind them. Fictional personas can give false confidence and bake in bias, so knowing how to build and use them well matters.

A coworking space app team runs ten interviews. Two clear behaviour patterns emerge. Some members book the same desk every week and want booking to be invisible. Others work there occasionally, mainly for meetings, and need to find a room at short notice.

The team writes two personas: The Regular and The Drop-in. Each has goals, current behaviour, frustrations and three quotes from real interviews. There are no stock photos. The Regular becomes the primary persona because they make up most revenue. In design reviews, the team asks "Does this slow down the Regular?" and catches several unnecessary steps.