WP:Orphan

In the Wikipedia:Glossary, an orphan is defined as "a page with few or no links from other pages." These pages can still be found by searching Wikipedia, but it is preferable that they can also be reachable by links from related pages; it is therefore helpful to adopt a page by adding links from other suitable pages.

What is the problem with an orphaned article?
A company with no advertising will not be known to others, and as a result, will get few if any customers.

Likewise, orphaned articles, since they have few links to them from other pages, are difficult to find, and are most likely to be found only by chance. Because of this, few people know they exist, and therefore, they get less readership and improvement from those who would be able to improve them.

In particular, if the topic is more obscure, this may make it difficult for many to locate. If not for links to a page, the only way such an article can be found is by a person who knows the topic entering it into Wikia or doing a web search, browsing a category in which it is contained, looking at the edit history of a contributor to the page, or having it show up as a random article.