When template {{Redirect category shell}} (Rcat shell) is used to add one or more rcats to a redirect, there is no need to include this rcat. Rcat shell detects protection levels automatically, so by default it will add this rcat to a redirect when it is first protected and then remove it from the redirect if and when protection is lifted. See Rcat shell's template documentation for details.
If used by itself, add this rcat to a redirect as follows:
This is in accordance with the instructions given at Wikipedia:REDCAT.
This rcat may be used to categorize template-protected redirects. Adding this rcat and populating the Template-protected redirects category does not in and of itself protect the redirect. Page protection can only be engaged by administrators.
Please do not alter the printworthy settings of this rcat without first notifying the Version 1.0 Editorial Team, who are responsible for any and all materials, including redirects, that go into a printed version of Wikipedia.
This rcat is used to tag redirects in template namespace, so this is just an information note about printworthiness. In main-article namespace, many redirects are considered unprintworthy; however, there are many others that are printworthy, so for some rcats there is no default sort for printworthiness. In 2003, efforts were begun to support the Wikimedia Foundation's goal of increasing access and availability of Wikipedia articles in printed versions. Some rcats automatically populate either Category:Printworthy redirects or Category:Unprintworthy redirects by default and others don't. That means it is up to editors to choose which of those categories, Printworthy or Unprintworthy, is appropriate and should be populated. The rcats that are used separately to populate those categories are: