Was recently asked about tagging.
There's two kinds of tagging, content and members.
Tagging Content
When you tag content you make it easier to find topics.
Just enter comma-delimited tags under the message of a new topic:
The tags show up under What's New?
Advanced Search let's you search for tags:
And you get points and an award -- go to Profile:
Tagging Members
Tagging members gets their attention.
At the top of threads is a box for this:
Click the button and enter member names as instructed:
Then click Submit. They will be notified and added to the tag list:
The number of times you do this is listed under your avatar:
Your Profile should have a tab to record tagging and getting tagged: