You can add a sub or child page to any of your main website pages. On your published website, subpages appear as an additional page when you click the main page. Subpages also provide supplemental information to your visitors and allow you to organize your content across several different pages instead of a single page.
In the Website Builder, click the Manage Pages button, which is located in the main toolbar, next to the Site Builder
menu.
The Page Manager opens and the pages associated with your selected design template appear:
In the following example, let's say that you want your About page to have a subpage of Services:
Select the Services page.
Move the page under the About page. When the down arrow appears, then drop the page.
The Services page now appears as a subpage to the About page.
A subpage has now been added to one of your main pages in your website.