Customer personas
Personas are useful when derived from real customers and harmful when invented, because a fictional persona lets a team agree confidently about someone who does not exist. The valuable content is the buying trigger and the objection, not demographics.
Method
- Build from real customers, not from imagination. Interviews, sales calls, and support conversations, with quotes rather than summaries (see customer-interviews).
- Capture the job being done. What they were trying to accomplish when they went looking, which predicts behaviour far better than their job title.
- Record the trigger. What changed that made them search now, since this is what marketing must catch and it is usually a specific event.
- Capture objections and alternatives verbatim. What almost stopped them buying is the material that improves conversion most.
- Keep the set small. Two or three personas can genuinely shape decisions; eight cannot and become a document nobody opens.
- Distinguish the buyer from the user. In business sales they differ, and messaging that speaks only to one loses the deal.
- Update against reality. Who actually buys usually differs from who you designed for, and the data should override the plan.
Boundaries
Personas summarise patterns and hide variation, so decisions with real stakes need actual research. Demographic detail is usually decorative compared to behaviour and context. Personas built from existing customers describe who you have rather than who you could reach.