What is a hierarchy filter?
A hierarchy filter is a filter type that shows hierarchical data in an expandable tree view. Good examples of data that can be used in a hierarchy filter are date and time information, or geographical data such as continents/countries/cities.
How do you create a hierarchy filter in tableau?
To create a hierarchy: In the Data pane, drag a field and drop it directly on top of another field. Note: When you want to create a hierarchy from a field inside a folder, right-click (control-click on a Mac) the field and then select Create Hierarchy. When prompted, enter a name for the hierarchy and click OK.