An orphaned article is an article that no other article links to. Readers are unlikely to find these pages without using a search engine, such as a wiki's internal search. This makes the wiki harder to navigate and makes the pages less useful because readers are less likely to find and editors less likely to improve them.
Finding and improving orphaned articles
The MediaWiki software generates a list of orphaned pages every day at Special:LonelyPages.
A good way to de-orphan an article is to use the wiki search to find other pages that mention the article's subject and add links. Creating redirects with related names also make it easier to find the article from a search, which will help readers and editors alike find it.