Before proceeding with the reading of the article, it is important that you already know the concept below:

To edit a rate region, simply access the [Catalog > Price Rules] menu and, on the left side of the screen, click on the desired rate region.
On the right side you will have the [Edit Region] button to start the changes:

The "default" region will not have this button on the right side.

From this option, you will be able to change the name of the rate region or delete the rate region:

If your rate region has linked listings and you want to delete it, you will first need to relocate the listings to other rate regions!