How to run a User Story Mapping session in Whiteboards?

User Story Mapping is a concept of visualization of all the steps a user completes when using a product. It's also a way to arrange user stories to create a customer's journey. It consists of goals, tasks, and activities ordered chronologically concerning the overall product workflow.

During the decomposition of such a journey into user stories, team members collaborate and brainstorm to cover each step in the user journey or every single activity. As an outcome of such an exercise, we can end up with a user story map. This backlog is intuitive to the whole team without extensive lecturing about the particular feature or app flow.