City pages are a separate level that fills in automatically, while location and group pages depend on tags.
City pages. Each listing’s city comes from its address in your PMS, so city pages populate without any tags.
Location and group pages. Tags are only needed for the location (region) and group levels.
How the levels relate. Location and city are two independent, filterable levels, not a nested tree. A location (region) page does not automatically list the cities inside it.