Different kinds of additional sections, i.e. modules can be added on a page. Modules determine what actually can be seen on the page. If no modules have been added, the page is empty.
With modules text and images, news and event lists, product lists and surveys, for example, can be added on a page. Modules are created when the site is built, and the site admins are in charge of modifying and updating the modules after it.
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