Creation of a site is the first step to start using the app.
Creating a new site requires you to choose a name, URL, theme (the Help Center theme is currently pre-selected) and initial content sources. These settings can be changed after site creation.
Each Confluence instance can have multiple sites, but a content source can only be part of one site.
A site's structure depends mainly on the number of content sources selected. Sites that feature only one content source follow this structure:
The site home is reachable under the URL you chose and functions as a landing page for your site. It is used to navigate to the individual content pages.
Sites that feature multiple independent content sources have an additional hierarchy level:
In this case, the site home, which remains under the URL you chose, is used to navigate to the individual content source home pages, which in turn navigate the user to the individual content pages. The site home is using the portal page template which you can configure in the theme editor.