Tagging

Is Tagging something you do  on FB or other social media?
Never come across it on a Forum but happy to be corrected!

I thought it was available on this type of forum using @Veggie would mean that you would know I had mentioned you in a post and was hoping for a response from you. It means you don't need to quote etc.  Maybe it's just another memory glitch I'm having. Yes it's very common on FB.