A stub is an article that is too short to provide encyclopedic coverage of the subject, but not so short as to provide no useful information. To qualify as a stub it must at least define the meaning of the article's title. Often that means three to ten short sentences, but less text may be sufficient to qualify as a stub for articles on narrow topics, and complicated topics with more than ten sentences may still be stubs. However, in reality, many articles which are labeled as stubs are much longer than that. You can help ActiveWiki by removing inappropriate stub notices.
Another way to define a stub is an article so incomplete that an editor who knows little or nothing about the topic could improve its content after a superficial Web search or a few minutes in a reference library. An article that can be improved by only a rather knowledgeable editor, or after significant research, may not be a stub.
Stubs may be marked through the use of the Stub template, which categorizes articles specifically marked by users as stubs. Short pages are also recognized by the wiki software, and can be viewed on the short pages list.