Bu using @mentions, you can alert people, places, and groups that you're talking about them.
When you create, or comment on, content in your community, you have the ability to @mention a person, place, or piece of content. For example, you might post "Trivia Night was a success for Team Chaos! @Trivia_Night_Group" to alert the Trivia Night Group or "@Joey_Ramone, please check out my question @Why is the Submit form not working today?" to focus the attention of Joey Ramone on the document.
When someone is @mentioned in a piece of content, a notification of the activity flows into their Inbox. Members and followers of groups you mention are notified in their Following stream and in any other streams that are following that group.
To mention a person, a place, or a content item: