Explanation
Implementing Incident and Service Level Management
can help you
* Restore service as quickly as possible

In the ServiceNow Change Management base platform configuration, the transition from the Review state to the Closed state requires specific documentation of the outcome.
* Close code (B): This field is used to categorize the result of the change (e.g., Successful, Successful with Issues, or Unsuccessful).
* Close notes (C): This is a mandatory text field where the implementer provides a summary of the implementation and any post-implementation observations.
While "Closed by" and "Closed" (date/time) are important for auditing, they are typically system- populated automatically when the state changes to Closed and are not manual requirements for the user to fill out to trigger the state transition.

Content Item can contain information or a link to a page so it is the best option to use when the content of the catalog item is static.