Following a scan, will show suggestions on how to optimise your system.
See any users using a JIRA Core, JIRA Software or JIRA Service Desk license who have either not logged in before, or haven't used the system within a predefined timeframe.
You can see graphically which Configuration Items need unused objects removed (e.g. you could have a large amount of unused Issue Types).
A panel shows any previous system scans you performed and what the configuration count was at that time/date, this helps track your progress to a fully optimised system.
Cleaner for JIRA supports deleting many configuration items in bulk:
Issue Type Schemes
Issue Type Screen Schemes
You can jump into the configuration page of the item or a JQL Search for all issues which are related straight from the interface - no more slow JIRA Admin load times.
Custom Field Deep Dive
Clicking on the Custom Field name will perform an on-demand scan of which Projects/Issue Types have values for the Custom Field, this can then be used to create Custom Field Contexts.
Reduction in scope will reduce your indexing time.