With possibilities: This is a redirect from a title that potentially could be expanded into a new article or other type of associated page such as a new template. The topic described by this title may be more detailed than is currently provided on the target page or in a section of that page.
When the target page becomes too large, or for any reason a new page would be an improvement, this redirect may be replaced with an article, template or other project page that is carved out of the target page. See also {{R to section}} and use together with this rcat when appropriate.
If the topic of the redirect is not susceptible to expansion, then use other rcats such as {{R to section}} or {{R to list entry}}when appropriate.
Since a new page may be created, links to this redirect should not be replaced with a direct link to the target page. To make redirects to this page, use {{R avoided double redirect}}.
{{R printworthy}} should be used together with this template when applied to a redirect in mainspace.
From a book: This is a redirect from a book title to a more general, relevant article, such as the author or publisher of the book or to its title in an alternative language.
Books should only have an individual article when they meet Wikipedia's notability guidelines and there is enough material to warrant a detailed article.
When appropriate, protection levels are automatically sensed, described and categorized.