Template:Update/doc

 is for use on articles that require major updating. It's kind of the "big brother" to section stub, which alerts editors to problems within just one section of the article. You should therefore never use this template for flagging problems that occur within just one section. When you place the template on the page, you should leave a note within the template as to what, exactly, needs to be added to the article.

Note that if the article needs major copy-editing or general cleanup, Template:Cleanup is perhaps more appropriate. If it's a Doctor Who universe article with an out-of-universe perspective, you should use Template:Oou.

Usage
Type

for example

at the top of the article requiring attention. Hence:

Categorisation
Articles tagged with this template are automatically placed within Category:Articles in need of major additions.