Hey folks, I've enable discourse tags. This exposes the tag box under the reply field - this is a great alternative to the old-school thing of putting qualifiers like [pymel] or [maxscript] into a question title.
You can also hashtag tags in a reply like so: #maya
Up at the top of the screen there's also a tags button, which will give you links to posts by tag:
I added tags to a random selection of existing posts just to get some idea of how it works. If you see a post that needs tags, you can add it by clicking on the pencil icon to the right of the thread title:
and then you'll be able to edit the tags underneath: