Alexandra Charrier

Hi, 

Someone here mentionned it is possible to use labels in order to backlist an article so it doesn't appear in the search results. 
In our knowledge base we have articles that are still availble and readable but are about a decomissionned feature. Therefore I would like for these not to show up directly on search. 
 

Does anyone know what kind of label I can use for this ? Or any other way to do this ?