Every account inside the platform is linked to a space. In the default setup we link one account to one space.
You can create additional spaces in Account > Spaces > Spaces. Click on Create Account Spaces in order to create an additional space. Space views can be created in Space > Customize > Space Views.
A space is the data container that stores configurations and data. However, an account can have multiple spaces. It is not possible to share data or configurations between spaces. If you want to share configurations but have some configurations (i. e. connectors or payment methods) only applied to one specific case then you should use space views.
If you have a multishop webshop that uses the same products but you have a country specific set up with different currency and different translations but the products sold are identical. In this case you should use one space and separate the different stores by space views.
In case the merchant has completely separated webshops that have a different database, then he should use two different spaces.
If you do have a webshop where you sell online products. On the other hand you have a small call center where you do sell different services. In this case it might be useful to use a space per use case.