This is module for administration panel.
It allows to display in back-end a list of recently added classifieds.

Navigate to Extensions > Module Manager and switch to view of modules for administator panel:

Choose the proper module from the list.
Let's take a look at parameters of that module.

Enter a number of ads that you want to display in the module, check if the module is published, select position to display (e.g. cpanel) and press Save button.

Look at the example view of module.