PrestaShop's zones are a list of the world's regions. This list helps categorize countries.
This lets you specify the zone to which your carriers will be able to deliver your goods. It may be a continent, a country, a group of countries, regions or even cities.
So, a shoe merchant with a store in France will perhaps need to deliver within France but also in Belgium. However, a pizza company will be more inclined to deliver only in the towns in the surrounding area. You can therefore decide on and manage the delivery zones you offer.
To create a zone, just click on the "International" link in the menu, then on "Locations". Then just click on the Zones tab.
Once the list of zones is displayed, click on the "Add New" button to create the new zone you require.
Once you have entered the name of the zone, click on Save.