Mentions are used to refer to another Twitter user and to notify them that you tweeted about them. Mentioning other users is a great way to get somebody to join a conversation or to share something interesting with others.
To mention someone, write your tweet like you normally would. Now add the user’s username to the tweet with an @ in front of it. Then publish the tweet, and you’re done. The user will be notified that you mentioned them. It should look something like this:
“Hey @sotrender, what’s up?”
Remember that spaces and punctuation break the mention, just like hashtags. So don’t include them in your mention. You can include a mention anywhere in your tweet.