@Mentions in Facebook

Previously, Facebook users could only use @ Mentions on contents they created from scratch, such as on wall posts and status updates.  That invention was useful, we liked it and obviously they have heard.

From now on, users can type the @ symbol when writing a comment to get the drop-down menu for @ Mentions.  Naturally, when a user is tagged, they receive a notification stating that a friend “mentioned you in a comment". 

They sure know how to lure visits and engagements on their website, but I am shocked it took Facebook this long to figure this one out.