The CMS broadly speaking has two page types - editable content pages and templated pages e.g. shopping pages
These are free-form pages that allow you to add your own content and images. All content layout is customised by you in the page editor
The webpage layout and editable content areas are controlled by the CMS. You can enable / disable options via the settings for the page. Some examples of templates pages are:
Editing the FOMO homepage content using the ContentBox page editor
The page structure will look similar to what you will see on the live website.
Editing the FOMO Shop page content via E-COMMERCE > View Products
Content does not represent what the site will look like but allows you to quickly navigate around content areas and manage content.