How does Tableau prioritize dimensions in a hierarchy?

Tableau prioritizes dimensions in a hierarchy based on the order they are dragged into the view. When users create a hierarchy, they define the structure and sequence of the dimensions intentionally by arranging them in a specific order. This order impacts how the data is aggregated and displayed in visualizations. By dragging dimensions to a particular position, users communicate the intended relationship and the level of detail for analysis.

For instance, if you were to drag "Country" above "State" in a hierarchy, Tableau understands that it should first break down the data by country before drilling down to state level. This method provides a clear and logical flow of data presentation as per user intentions, distinguishing it from alphabetical ordering, random assignment, or any data type considerations which do not convey hierarchy effectively.