Use this tag on questions about the responses tab with comments, edits and answers on your own posts. The tab is found in the user profile.
Responses like edits, comments and answers to your own posts are listed in the tab responses as found in your user profile.
Use this tag for questions about which actions lead to responses listed there, for bugs or for adding extra categories.
Consider adding the profile-page as well.
Do not use the tag for general type of responses (like e-mail, chat, rss etc).