Comment by tonymet
There are both, every user has their own sandbox. But this one is there to encourage first time visitors and the uninitiated to make changes , so they know that anyone can contribute uninhibited.
There are both, every user has their own sandbox. But this one is there to encourage first time visitors and the uninitiated to make changes , so they know that anyone can contribute uninhibited.
If you really want something private, there is https://en.wikipedia.org/wiki/Special:ExpandTemplates (or of course just hit preview and dont save)
Though, just to be clear, the per-user ones are also public. They're just a convention where if you make a subpage of your user page and call it "Sandbox", nobody is going to complain about the encyclopedic value of your edits.