This page allows you to specify which pages this module is attached to, a lot faster than having to go to each page and manually attach (or detach) the module.
Page Name: This is the name of the page, as see in the admin. Each name is a link that will take you to the page details for that page in the admin.
Attached: If this is checked, then the current module will be attached to that page. If you un-check a box, it will detach the module from that page.