Pages are used to build main menus within Dunked. By default, the Page Title is used as the Menu Label within the menu. This means that the Menu Label field is optional.
If you want to create a page with a Menu Label that is different from the title of the page, you will need to fill in the Menu Label field with the desired menu label. For example, About could be used as a simple Menu Label for a page title "All about me and my work".