In this podcast episode, Michael Margolis, a UX researcher at Google Ventures, shares insights from his book "Learn More Faster" and introduces a one-day sprint for pinpointing a "bullseye customer." This term refers to a specific group within your target market that is most likely to embrace your product. During the sprint, the team interviews five potential customers using three simple prototypes, while observing and discussing the insights gathered. This approach helps prevent the development of products that no one wants, streamlines focus on what really matters, and speeds up achieving product-market fit. The key is to start with an extremely narrow target and refine it through the insights gained during the research.