By malmy at 27 June, 2013, 7:35 am
i know it means reply to that person, and they will be able to see it; I guess my question is: do they have to be following you to see it? (like when a tv show wants you to reply to a question they ask… if they are not following you, can they not see it?)
No, they don’t have to be following you, but you do have to be able to write on their profile. Any tweet you send to any user will receive the @ symbol on their profiles.