To structure Power BI dashboards for storytelling, developers should start by defining the narrative and guiding users through the data in a logical flow. Each visual should build upon the previous one, creating a coherent message. Highlighting key insights using KPIs, annotations, and dynamic text boxes can emphasize the story's central points. Filters and drill-through options allow users to explore deeper details while staying within the narrative framework. A well-structured dashboard should engage users, prompt them to ask questions, and provide answers in a visually appealing and informative way.