In product design or user experience design, we are much more familiar with techniques such as user interviews, questionnaires in the initial phase. The raw data collected by the requirement gathering methods are then synthesized by competitor analysis, user flows, use cases, heuristic evaluations. We visualize this information by persona generation and designing visual designs to visualize how the actual product going to be. Somewhere on the line, we have to consider the actual users who will be using this application as well. The world that the real users live in may differ from how we imagine it to be. The proper understanding of how the product that the designers create will help the real users who are outside the development environment would be a definite plus to creating better engaging and usable products.
https://uxplanet.org/storyboarding-in-ux-and-trips-and-hacks-e6eb7a9f052a/