From a page move: This is a redirect from a page that has been moved (renamed). This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.
From a song's cover version: This is a redirect from a cover version of a song to the article about the original song this version covers. This accords with editing guidelines located at WP:SONGDAB.
Use this rcat only on redirects that are in Wikipedia's main-article namespace, and only when the redirect's topic is a song which is a cover version of its target. If it is not a cover version of its target, use {{R from song}} instead.