Well, it's more an old feature that I've updated to work a little better. Questions can now be 'closed' by Editors or Moderators. (Previously when I turned this feature on, users could close their own questions which caused some problems.)
Closing questions is a precursor to hiding them. The advantage for users is that their post doesn't suddenly disappear, they can see a reason it's closed. Closed questions can be hidden at a later date (for example a week later).
Editors/Mods can now see a "close" button next to "hide". When clicking that you'll get a box labelled "Reason for closing this question, or URL of duplicate question". If you're closing due to rule-breaking (for example it's an opinion question) then put a short reason in the box. If you're closing due to a duplicate question, copy and paste the URL of that question in the box. For the latter, when closed it will show a link to the duplicate question. Example
Anything like spam or offensive posts should continue to be hidden as normal. Let me know here if you have any questions/concerns.
