...
This module is only populated for logged-in users – it is empty for anonymous users. We suggest using the page’s View Permissions to only show the module’s section to users logged in to Atlassian.
...
All Refined Pages, Jira Projects, and Confluence Spaces that you add in the Site Builder get their own landing page on your Refined site. Modules are the building blocks of these pages.
Go to a page’s Layout Editor.
Hover your mouse over a spot in the layout and click the + Add module button that appears.
...