The "Related changes" feature lists all recent changes in each article linked to from the current page, but not more than the number specified in the preferences. Its header is "Recent changes" with subheader "(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 linked to from the current page, but with the important difference that all changes are listed, not just the last one. On the other hand, Related Changes does not automatically include talk pages; to watch also the corresponding talk pages, links to them also have to be in the page on which Related Changes is applied.
The option "Hide minor edits" that can be set in the preferences applies among other things to Related Changes.
See also hide minor edits.
Note that for links to redirects, only a change in the redirect is given, not a change in the target article. In this regard a direct link to the target article is superior.
The "Related changes" feature neither lists changes in images or sound files nor in image description pages (regardless of which of the three linking methods (image, :image or media) is used.
When applying the feature to a subpage, 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.