Sections hold the content in form of elements and are used to structure a page. For example on this page we have a top menu section, a header section with an formatted text element and the image (only visible on large devices), this intro section and so on.
You can create a reusable templates from sections or even use the same section across multiple pages
, like the menu and footer on this page.
in the section properties, you configure the background (like colors, images and even videos), spacing (padding and margin), borders and f you wish hundreds of other CSS settings.