"How can I manage pages?"
To add more pages go to Edit Page > Add Page. This will give you the option to add a new blank website page, an external page, or default pages like a blog or an online store. From the Edit Pages menu you can also reorder pages to change how they appear in your navigation menu, hide a page from your navigation, and configure SEO settings.
Add Default Pages
To quickly add pages that already contain a few blocks to get you started, you can select from a list of default pages on the Add Page menu. You can add additional blocks to default pages just as you would with blank pages.