I think I had this clear, but it seems I don't. I had the idea that closed questions can not be searched on Google, and can only be seen by the users of a given site with more than 250 reputation.
Who can see closed questions? Can anyone see these questions from Google? If so, what is the point of having a 250 reputation threshold?
Note: this is not about what/when/how to close a question (as the post linked). It's about viewing closed questions.