In the Vinony graph
It is catalogued under the topic Documentation header templates.
Vinony links it to 44 Wikipedia language editions.
~3 min read
Encyclopedic overview
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This template can be added to templates' {{documentation}} pages or nested within <noinclude>...</noinclude> tags for templates that are used occasionally but may often have zero transclusions or orphaned. Adding this template will prevent the template on which it is transcluded from appearing on reports of unused templates for the Unused Templates Task Force, like Wikipedia:Database reports/Unused templates/1, which in turn will limit misguided TfD nominations.
Excerpted from Wikipedia’s “Template:Transclusionless” article, available under the CC BY-SA 4.0 licence.