When used with the "Redirect category shell" (Rcat shell) template:

Template {{Redirect category shell}} may be used to add one or more rcat templates, along with their parameters and categories, to a redirect. For more information see the documentation page below.

When used by itself:

  • Of dubious utility: This is a redirect from a title that does not appear to be useful. Pages that use this link should be updated to link directly to the target without the use of a piped link that hides the correct details.