For example, `{{!!title}}` denotes the value of the ''title'' field of whatever the current tiddler happens to be. This technique can be used in a [[TemplateTiddler|TemplateTiddlers]] to keep the template generic.
The title of the current tiddler can always be found in the [[currentTiddler variable|WidgetVariable: currentTiddler]].
The current tiddler is set in several ways, including by the ListWidget and the TiddlerWidget.