In ProcessWire, this is most commonly used when you want to separate a large list of links into multiple pages, making it easier for the user to browse, and quicker for the server to render. For instance, lets say that you needed to generate a list of links to 100 pages, but only wanted to display 10 per page. This module makes that easy, and it is already hooked into other modules to make it even simpler. Here is an example from the Skyscrapers demo site.