Jeff Patton - User Story Mapping: Don't Lose the Big Picture at Agile 2015

A story map is a simple way to visualize your product idea from your users’ perspective. Mapping your product's story uses the same approach scriptwriters use to think through a movie or TV story idea. It's fast, collaborative, and telling your product's story helps you spot the holes in your thinking. Once created, a map lets you think through options and alternative ideas that'll make your product better. It's easy to slice out what you think is a smallest viable product, and to identify the next experiment that'll help you validate your product concept.