You can use zone groups to group a number of zones. These zone groups you can then use as a parameter in some of the reports.
Unique key identifier (unique number), automatically created.
Description of the zone group as it appears in choice lists when using zones. To define for each supporting language.
The effective zones who belong to this zone group. You can add zones from all available areas (left list) to the group (right list). With the icons between the 2 lists you place the zones in or out of the group.