Help:Parameter

Parameters are components of some templates that allow the user to add data to be displayed within the template (usually within a banner or infobox). They usually appear as numbered ("1") or named ("param"). Note that there are a set of three curly braces ({{{ and }}}) around each parameter. This is different than normal template name usage.

For more information on parameters, please see MediaWiki: Parameters in Templates and WikiMedia: Parameters in Templates.