What Is a Buyer Persona? How to Build One from Data and Interviews
Going beyond "office worker in their 30s" — and why personas go stale
A buyer persona is a concrete representation of a target customer as a fictional person. It goes beyond simple demographics to include behavior patterns, motivations, frustrations, and information consumption habits.
A good persona is not '30s office worker' but rather '32-year-old Kim Marketer, solo marketing person at a startup, budget of 500K KRW/month, biggest concern is ROI measurement.'
Creating 3-5 core personas becomes the basis for all decisions in content, advertising, and product development.
Execution Steps
Analyze existing customer data (CRM, purchase history, behavior logs)
Conduct customer interviews/surveys (minimum 5-10 people)
Extract common patterns → Create persona profile
Share with the team and use for marketing decisions
Pros
- ✓ Marketing messages become more relatable
- ✓ Entire team shares the same customer understanding
- ✓ Reduced unnecessary targeting waste
Cons
- ✗ Assumption-based personas may diverge from reality
- ✗ Becomes outdated without regular updates