T.O.W.E.R.I.N.G. Wikia:Templates

A template is a special type of page that has been designed so its content can be included in other pages. Since a given template can be included in many pages, it can help reduce duplication and promote a uniform style between pages.

Templates can be useful for... Templates are usually located in the Template namespace. This includes any page with a name beginning with Template:, such as Template:Name.
 * Creating content that should appear on many pages.
 * Formatting content (such as infoboxes) in a way that should be consistent across many pages.
 * Creating a shortcut for writing things that you repeat often when communicating with others.
 * Replacing long, complicated code so that a page is easier for other users to edit.
 * Protecting parts of a page from editing while leaving other sections open for edits.