Editing Incubator escapee wiki:Template namespace (section)

=== Substitution ===
{{main|Wikipedia:Substitution}}
Invoking a template using the form 
: '''<code>{{<span style="color:red;">subst:</span>name of template ''(|parameters |...)''}}</code>''' 
(that is, inserting '''<code>subst:</code>''' immediately after the opening pair of curly brackets)
will make a copy of the template text and place it on the page, where it will be viewable in the source. The template is no longer [[transclusion|transcluded]] and future changes to the template will not change the text. As a [[#Guideline|guideline]], this method should be used for any short, temporary messages which are removed quickly, such as on User_talk: pages. The standard new user {{tlx|Welcome}} message is a good example.

Use subst: also if you need to edit the message after including it on the page. If you don't need to edit it, and would rather the message is automatically updated along with changes made to the template, don't use subst:.