To access this module, go to your site back-end. Using the top menu, go to Extensions -> module manager and select "new". Then, select Wrapper.
This Module shows a list of Articles that are related to the current Article being viewed by the user (for example, a Article Layout or a Blog or List layout where the user has clicked on an Article link). Articles are considered to be related to each other if they share at least one Keyword in the Article's Metadata Information. Article Keywords are entered in the Metadata Information section of the Article Manager - New/Edit screen.
An example is shown below: