This template is meant to be placed at the top of pages for categories whose contents are related to portals (i.e. in Wikipedia's portal namespace). Their parent category is Category:Portals. See also Wikipedia:Avoid self-references.

|description=a description	Adds a description of the category and/or its associated portal to the first message box.
|nolinkinfo	Suppresses the appearance of the second message box (describing how {{portal}} may be used to present a link to a portal).
|topic=topic	Sets the topic used to demonstrate the portal link in the second message box (if the link there is incorrect or an alternative required).