Let me try to give an example of what I think we're talking about:
Suppose I launch a new website on the domain wacky-widgets.com, and give it the name "Wacky Widgets". Also, suppose that in the past there have been very few searches on Google for the term Wacky Widgets or the term wacky-widgets.com.
Now suppose I do some link-building and promotion for my new Wacky Widgets site, and begin to get some visitors.
Now suppose the Google search page starts seeing searches for the terms Wacky Widgets and wacky-widgets.com, and that the number of these searches increases over time in proportion to the amount of traffic my site receives. That's the kind of ranking signal I thing we're talking about in this thread.