On both the [about page][1] it is explained how the site works. To my eyes, this should include that a user asking question should *edit* his post to improve it if some other users are asking clarification or to provide more information.

Even in the [help area on asking][2], there's nothing about that either! This results in loads of new users trying to post comments to include more information.

So, could we either (or preferably both):

 - Include a topic on the help page on asking, e.g.:

    > ### Someone asks for more information in a comment. Should I reply or edit my question?
    > 
    > On a Q&A site it's a convention that you include all information in the question body rather than posting information in comments. It is also not needed to put a new section "update" in your question body, as we can see that you've edited your question. Your question will also appear on top of the "Active" list again.

 - Include a short section on improving a question or how to handle comments.


  [1]: https://askubuntu.com/about
  [2]: https://askubuntu.com/help/asking