LINK ROT

LINK ROT

Link rot is the process by which links on a website gradually become irrelevant or broken as time goes on, because websites that they link to disappear, change their content or redirect to new locations.

The phrase also describes the effects of failing to update web pages so that they become out-of-date, containing information that is old and useless, and that clutters up search engine results. This process most frequently occurs in personal web pages and is prevalent in free web hosts such as GeoCities, where there is no financial incentive to fix link rot (most of these sites have not been updated for years on end).

source : wikipedia