Public folders typically contain reports that are of interest to many users.
You can save a report when you set options for the current run Set Report Options for the Current Run or you can use advanced report options Set Advanced Report Options for the Current Run to save a report in Report View Create a Report View.
To share a report that is currently located in your personal folders, copy the report Copy an Entry, move the report Move an Entry, or create a shortcut to the report Create a Shortcut and save it in the public folders.
For information about saving reports, see Query Studio User Guide, the IBM® Cognos® Report Studio User Guide, or the Analysis Studio User Guide.