Help:Templates

Templates are pages in the template namespace. This means any page beginning with "Template:", such as Template:Templatename. The content of a template can be added to a page by typing.

Templates are used to add recurring messages to pages in a consistent way, to add boilerplate messages, to create navigational boxes and to provide cross-language portability of texts.

If you do not know how to create or use templates, or what exactly they do, you may want to have a look at the metawiki quick_guide_to_templates.

Templates from the Central Wikia can be used in Clean City, too. See wikia:Help:Shared templates for details.