Backlinks is a nice navigational feature, which is configured by WikiAdmin. After the feature has been activated and you have created a link to a page, e.g., ((SomeWikiPage)), a dropdown box will appear on the page to which you pointed.
chealer: so ktest if I understand correctly, you don't understand why SomePage has no backlinks, right?
chealer: which page(s) links to that page?
ktest: no page
chealer: well, how can it have backlinks then?
Orphaned pages, i.e., pages to which there are no pointers, will lack the Backlinks dropdown box.