This is a disambiguation page: a list of articles associated with the same title. If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
If you expected to find an article that is not listed in the disambiguation page, this might mean the article does not exist yet or has not been added to the disambiguation page.
This guideline asks that links that point to disambiguation pages be changed to point to the correct articles.
When a link that leads to a disambiguation page is changed to point to a new article, it means the disambiguation page can become unlinked.
Disambiguation serves a single purpose: to let the reader choose among different pages that closely relate to various meanings of a particular term (some of which might logically utilize said term in a titular fashion).
Disambiguation should not be confused with the merging of duplicate articles (articles with different titles, but regarding the very same topic, for example "Gas Turbine" and "Gas turbine", or "loo" and "restroom").
Disambiguation descriptions should not be created for subjects whose only articles are on pages of sister projects, even if the disambiguation page already exists (e.g., the poll on 9/11 victims).