The difference between organizing your data in a list and organizing it in a data extension is that in a list, you organize subscribers by name. In a data extension, you organize them by region.
<h3>What is Data extension?</h3>
A data extension contains contact information. A data extension is just a table with fields for contact information.
Data extensions can work independently or in conjunction with other data extensions.
The data may be used for searches, information retrieval, and sending to a selection of subscribers.
You have two options for importing data extensions: manually or automatically using Automation Studio or the Marketing Cloud API.
Both Contact Builder and Email Studio allow the usage of data extensions, but Email Studio is the only place where sharing, permissions, and other features are available.
To learn more about data extension, refer to the following link:
An application program that runs on a server tier computer. A typical commerce server obtains product data from a database, manages items in users' shopping carts, and coordinates the checkout process.
