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This facility works also for a page that does not exist (there may be links to it, which makes it extra useful to create it). The ''What links here'' button is also on the edit page on which one arrives when following a broken link.
To invoke a ''what links here''  list directly, use e.g. <nowiki>[[w:Special:Whatlinkshere/John Smith]]</nowiki>resulting in [[w:Special:Whatlinkshere/John_Smith]]. ==Limitation==Not listed are [[Help:Link#Subpage_feature|subpages]] that just have an ''automatic'' link to a page. ==Redirects==The backlinks feature shows which backlinks are redirects. The backlinks of the redirect are also shown, and if they include a redirect, the backlinks of that also (not more). This makes it a useful tool for finding double redirects, which do not work, and, except in special applications (see below) can better be replaced by redirects to the final target. ==Cases of inclusion==Whether there is a link from A to C is relevant for backlinks as well as Related changes. If C does not exist, only backlinks are applicable. *Inclusion is listed as such.*A link from A to C counts as such even if the link is not explicit in the wikitext of A, but due to the inclusion of B, which links to C.*If A calls B and there is a link in B to C within noinclude tags then B links to C, but A does not.*If A calls B and there is a link in B to C within includeonly tags then A links to C, but B does not.*If A calls B and B links to a page C that depends on a variable or parameter, then:**The question whether A links to C depends on the value of the variable on page A, or the parameter with which A calls B.**The question whether B links to C depends on the value of the variable on page B; in the case of a parameter, considered from page B, the page may e.g. not call a valid page name (because it calls one with a name with braces), so B does not link to any valid C, or a name depending on the default value of the parameter. Thus a link from A to C may be due to the inclusion of B, even when B, considered by itself, does not link to C. Thus, to find out what templates cause pages to link to C, it is not sufficient to check for templates in the backlinks of C. If some pages link to C due to the inclusion of B, it is more convenient if B is in the list of backlinks of C. One can assure this by putting an appropriate example of usage of B on page B, inside noinclude tags (B includes B, but without recursion). Otherwise a page like B, which causes pages which include B to link to C, can only be found by looking for pages which directly or indirectly are included in these backlink pages of C. Examples:*[[Template:H:f]] calls Template:h:f <nowiki>{{</nowiki>NAMESPACE}}. Considered by itself that is the unused Template:H:f Template [http://meta.wikimedia.org/w/index.php?title=Special:Recentchangeslinked&target=Template:H:f&days=3000&limit=50], [http://meta.wikimedia.org/w/index.php?title=Special:Whatlinkshere&target=Template%3AH%3Af_Template]*This page '''Help:What links here''' links through [[Template:H:f]] to [[Template:H:f Help]] [http://meta.wikimedia.org/w/index.php?title=Special:Recentchangeslinked&target=Help:What%20links%20here&days=3000&limit=500], [http://meta.wikimedia.org/w/index.php?title=Special:Whatlinkshere&target=Template%3AH%3Af_Help]. This page is therefore a backlink of the latter, but Template:H:f is not listed. Even without a template name depending on a variable or parameter, if page A links to page C due to the inclusion of template B1 which redirects to B2, which links to C, A is in the list of backlinks of C but B1 is not. Summarizing, for the purpose of backlinks and Related changes, A links to C if there is, in that order, a chain of template calls, a single redirect, template calls, a single redirect, etc., template calls, and a chain of redirects. In the case of an image, using it in a page is listed in the third section of the image description page, but not in "What links here" of that page ==Order==When the link tables in the database are rebuilt, the lists are alphabetically ordered. However, adding a link subsequently causes it to be added to the end, and thus these occur in chronological order. See also [[Help:Category#Comparison_with_.22What_links_here.22|Categories - Comparison with "What links here?"]] {{h:f|enname=What links here}}
