Link rot
 

Link rot is an informal term for the process by which increasing numbers of links point to web pages, servers or other resources that have become eternally unavailable.

Link rot (or linkrot), also known as link death, link breaking or reference rot, refers to the process by which hyperlinks on individual websites or the Internet in general point to web pages, servers or other resources that have become permanently unavailable.

Link rot conjointly called link death, link breaking or reference rot, refers to the method by that hyperlinks on individual websites or the net normally purpose to web content, servers or alternative resources that became for good inaccessible.

Link rot is a slang term for hypertext links that are broken. Link rot is created when a Web page is moved, taken down or reorganized. Clicking on a rotten link usually results in a 404 error, which includes a message that the page cannot be found.

"Link rot" refers to hyperlinks that point to servers, web pages or other resources that have become permanently unavailable in other words, links that lead nowhere.

Link rot is the tendency of hypertext links from one website to another site to become useless as other sites cease to exit or remove or recognize their webpages.

That's why i love forums so much to learn here.

Nice topic :)