Every site includes a Top Navigation which can be edited using the _topnav.pcf file. Navigations can be updated in the WYSIWYG editor using a bulleted list of links. It displays at the top of every page of a site and is the primary method to navigate it. Each site only has one Top Navigation, you can not create more in sub-folders, instead use Side Navigations.
Top Navigation Page Properties
Adds your site name to the top nav. This provides the user with a title for the site on mobile. It also links to the homepage of your site.Changing Branding