Difference between a hosting and a site

On a technical level

A hosting covers different websites. It is therefore possible to add several websites to a hosting (multisite management). In this case, the hosting resources (disk space, databases, runtimes and script memories, etc.) are shared between the different websites on the hosting.

For example, the basic Cloud Server plan contains 5 hostings and 20 websites. That means that you can create 20 website with 20 different domain/subdomain names which you can organise freely among your 5 hostings.

On an administrative level

You can assign rights at the level of a hosting. For example, you can assign the management of all sites contained on one hosting to one person.

However, it is impossible to restrict the management of certain sites within the same hosting.

A user (which you add on your management platform) cannot have a right limited to a single site, but only to a hosting.

However, you cancreate an FTP user limited to a specific folder (in this case, you'd have to limit the user to the folder where the site is located).