An @reply is any update posted by clicking the "Reply" button on another Tweet.
People say lots of things on Twitter, and sometimes you want to say something back. Your reply will always begin with @username (insert username of the person you are replying to). Any Tweet that is a reply to you will show up in your Mentions tab on the Connect page.
To post an @reply on Twitter:
A mention is any Twitter update that contains an @username anywhere in the body of the Tweet. (Yes, this means that @replies are also considered mentions.)
We noticed people frequently searching for their username to find the Tweets that mention their username anywhere in the message. We collect these messages, as well as all your @replies, in the Mentions tab on the Connect page. If you include more than one person's name in your update and you use the @username format, all of those people will see the update in their personal Mentions tab.
To post a mention on Twitter:
Easy! Just click on the Tweet and it will expand to display the Tweet they replied to, as well as other content related to the Tweet.
Check out our Tweet & DM troubleshooting section for solutions to common problems.