The site store
The site store defines the physical structure of the website, i.e. each folder in the site store corresponds to a navigation menu level, which means that a new navigation level is added automatically for each new subfolder added.
Page references are used to display the imported content from the page store on the website. Each menu level is linked with a page from the page store.
In addition, the site store also defines the placement order of menu items and different display types.