Downvotes and close votes should always be accompanied by a comment. While not strictly required as per SE policy this is especially important for new users. We should direct our criticism at bad or unwanted questions, not at unwanted users. Beginners – no matter how otherwise knowledgeable or qualified – make mistakes, that is to be expected.
Because there are a lot of similar situations, below is a list of comments that can be copy-and-pasted to provide new users more insight into how this site works and give reviewers a little help to save on keystrokes.