Pages are inside src/app/pages.
Each page has its own module and component.
Parent elements (paths) such as elements, forms, tables and more have also their own modules which handle the routing.
For example when you open more/more.module.ts you can see that each path loads its own module (lazy loading).
You can see that the empty path
'' for more module which is something like http://yoururl.com/more is deactivated using SubmenuDeactivate provider, so when you click on the router link for this path, it doesn't start navigation. It's only used to toggle the submenu.
These are only used for Ace demo, and you don't need to use them
You can refer to each page for more examples as how to initiate some 3rd party components, etc