Cascading filters allow you to filter based on multiple values in a hierarchy, such as
by region, country, and city.
Lower level choices are filtered by the values selected at higher levels. For example, you can
create a cascading filter that allows users to select from a list of managers, then select from
user groups that are managed by the selected manager. Report data is then filtered to show only
records assigned to that group.
Alternatively, you can leave lower levels of the filter unselected, such as by selecting only a
manager but no user group. Report data is then filtered to show records assigned to any group
managed by that manager.
Cascading filters retain the last elements selected on a dashboard.