a notice to Wikipedia moderators please do not add external links to this page as it serves as an example of a dead end page.
A dead-end page is a page that contains no internal links to other Wikipedia articles. Adding links to these pages will help to integrate them into the encyclopedia, and assist readers by allowing for easy cross-referencing of information.
this page/article serves as an example of one. usually wikipedia would either take these pages down or post them on the "Wikipedia:dead-end pages" page and hopefully a Wikipedia moderator would add in the necessary links.
something of the opposite is a page that as no external links leading to it. an example of that being Haloacid dehalogenase like hydrolase domain containing 5 a wikipedia page which no other wikipedia pages link to.