Today on Stack Overflow, roughly 20% of questions are edited after they are closed and just 3% of closed questions are ever reopened. We’d like to see more questions improved upon so that they have a better chance of being reopened and answered.

To be honest, this seems like a very strange goal. Many questions does not get reopened because they are bad questions to begin with. They kind of fall into the category "you cannot polish a turd".

The real question is how to make new users post less questions that requires closing and editing.