A folder is a collection of stories. You can create a simple structure for your content using folders. For example, you can have a folder for news and for content translated into another language.
If you want to have an English and a German version of your website for example, you could simply create an en and de folder in the root of your space. If you want to create news entries, we would suggest creating a news folder in your en or de folder. The slug for your story will automatically append to the parent folders.