A stub is a short and unfinished start of an article. It's a way for people to start an article on a topic and either come back later to finish it or have others finish it.
One should put a notification at the bottom of a page to mark a stub. Such a notification will look like:
You can do this by simply adding the line
where you wish the stubnote to appear.
If you add enough to a stub that you no longer consider it a stub you should remove the disclaimer. Use your best judgement on this.