User:Johan G/Template:Informative template with preloaded text/preload text

Goal

This template can be used to...

Adding this template to a page will automatically add Category:... to that page.

Caution Caution that might help prevent lost work, very complicated debugging etc...

Note Note that might be helpful or lead the reader in the right direction.

{{template|mandatory|optional |mandatory= |optional=}}

parameter: What it does and how to use it. This parameter is mandatory... ! optional and defaults to...