If page A links to page B, then a 'back link' would be a link which goes from page B back to page A.
On this wiki, the title of each page works as a back link. Clicking on the title of any page finds all the pages referring to that page. It works for any wiki page. E.g. to find all pages that link to this page, click the title at the top of this page.
Before you delete a page, please check the BackLinks and clean them up to avoid creating broken links. Note, however, that there is a Backlink Lag that should be taken into account.
If backlinks aren't working for you, see Back Links Broken, or fix what is broken about it, or wait for gnome to fix it.
I have found Back Link does not work quickly enough when I check the links for several pages in a roll (different from Backlink Lag). Solution I have found is to use c2.com 
PageNameHere
A real eyeopener for the value of backlinks is
Try adding this to a page that you know has links to it:
<a href="javascript:window.location='http://www.google.com/search?as_lq=' + window.location.href">Backlink</a>
It's sort of an indirect one-to-many backlink, with Google doing the heavy lifting.
See:
Reverse Link Disabled for the past and Reverse Link Enabled for the present.
Full Search for notes about indices and other search methods.
Meatball Wiki if you'd like to discuss the Back Link's purpose in overall hypermedia.
Come From and the Inter Cal language. -- Steven Newton
See original on c2.com