Navigation articles are short articles that can include cards or an image gallery to facilitate highly visible navigation around a site.
Navigation cards form the key visual navigation aids in Smallsite Design. They make favoured parts of the site more attractive and discoverable compared to using Categories pages, though such pages can be the target of cards or gallery images.
To keep the pages focussed on the primary function of navigation, the allowed content above the cards or images is limited to a few blocks, like paragraphs or lists.
A home page is a navigation page, but tied to its subsite.