The Related changes feature lists all recent changes in each page linked to from the current page, but not more than the number specified in the preferences. Its header is Related changes with sub header "(to pages linked from "xxx")".
This feature can be used to set up custom watchlist-like functionality. It behaves like a watchlist, which would contain every page to which the current page linked. However, Related Changes do not automatically include talk pages; for the talk pages to be automatically included, the page to which Related Changes is applied has to link to these pages.
Note: The option Hide minor edits that can be set in the preferences applies to Related Changes.
Note that for links to redirects, only a change in the redirect is given, not a change in the target page. In this regard a direct link to the target page is superior.
The Related changes feature does not list changes in images, sound files or image description pages (regardless of which of the three linking methods (image, :image or media)) is used.
When applying the feature to a sub page, the automatic link to the parent page is ignored, i.e., changes in the parent page are not listed unless there is also an explicit link to it.