Best practices for Power BI dashboards design include creating a clean, intuitive layout with clear visual hierarchies. Developers should use consistent color schemes and ensure that the most important data is prominently displayed. It’s essential to limit the number of visuals to avoid clutter and focus on key performance indicators (KPIs). Ensuring proper labeling of axes, titles, and legends is crucial for clarity. Developers should also optimize the performance of the dashboard by reducing unnecessary data loads and focusing on efficient queries to improve loading times.