Please allow me to give an example to explain this feature:
When I showing image scroller from one single K2 category (or com_content category) , the visitor will see only a few images (articles) in this module. Maybe he want to see a full list of ALL articles in that category. Then, we need this feature: we show a "More… " button at top right corner (in the same line as the module title), which links to the "blog or list view of the SAME category".
Well, in order to make this button full functioning, maybe several different ways should be considered to be the link source: