When you create or comment on content in the community, you have the ability to mention a person, place, or a piece of content. This is a way to give a shout out to someone or something to catch their attention. It also notifies any person mentioned after the @ that you were talking about him or her. When someone is @mentioned, a notification of the activity appears in their Inbox.
The @mention also doubles as a link. You can add links to documents or groups by typing its title after typing @.
To mention people, places and things: