After activating the uListing plugin, you can use three default regions: California, Las Vegas, New York in the current version. Each created listing product is shown on the map of one of the regions. These regions will be shown as a dropdown menu in the filter when you add them to the "search form" filter.
From the dropdown menu, choose any region to search it effectively. The list of regions in the dropdown will appear like that:
Go to Listings > Regions page to create a new region or edit the created regions.
To add a new region, you must fill the given gaps for the following attributes:
name - a name of the region which is shown on your site
slug - used for URL name
parent category - can be none or any other region created before
description - it is optional, you can skip it but some themes may show this attribute
icon or image - you can choose an icon for a region or an image
After filling in the necessary attributes, click the Add New Region button below to create it.
On the right side of that page, you can see all the present regions with their description, slug, and count info.
As the above example shows, you can hover any region to edit or to delete.