# Tracking categories

Indexed pagesindex-categoryThe page has a __INDEX__ on it (and is in a namespace where that flag is allowed), and hence is indexed by robots where it normally wouldn't be.
Noindexed pagesnoindex-categoryThe page is not indexed by robots because it has the magic word __NOINDEX__ on it and is in a namespace where that flag is allowed.
Pages using duplicate arguments in template callsduplicate-args-categoryThe page contains template calls that use duplicates of arguments, such as {{foo|bar=1|bar=2}} or {{foo|bar|1=baz}}.
Pages with too many expensive parser function callsexpensive-parserfunction-categoryThe page uses too many expensive parser functions (like #ifexist). See Manual:$wgExpensiveParserFunctionLimit. Pages containing omitted template argumentspost-expand-template-argument-categoryThe page is bigger than $wgMaxArticleSize after expanding a template argument (something in triple braces, like {{{Foo}}}).
Pages where template include size is exceededpost-expand-template-inclusion-categoryThe page size is bigger than \$wgMaxArticleSize after expanding all the templates, so some templates were not expanded.
Hidden categorieshidden-category-categoryThe category contains __HIDDENCAT__ in its page content, which prevents it from showing up in the category links box on pages by default.