As shown on WantedPages this macro display pages which are wanted by other pages and from which pages the wanted pages originated. Wanted pages are references to non-existent pages in another page.

If used without options, [[WantedPages]], the macro returns a list in the following form:

(3) ViewMacroEngine?
(1) ActualNonExistentPage?

Where the number indicates how many times the reference to this page is made, and is a link to search for pages having the name of page. The question mark at the end notes, as usual, that this is an editable link. So if you press it will open a link where you can create the wanted page.

Since the search, hitting the number link, doesn't return the actual pages where the wanted page is referenced a CurlyOptions was added to this macro. Therefore if you specify [[WantedPages {origin}]] (or [[WantedPages {o}]]) in its shortest form you will receive the following result:

(3) ViewMacroEngine? from ?SomePage, ?AnotherPage, ?LastPage
(1) ActualNonExistentPage? from ?FormattingGuide

The information added denotes the pages where the wanted page actually appears. The question marks in front of the page name/links indicates that this link is actually a link to the edit page of the given page name.