There is an old post about the lack of the ability to place or add tags to posts: Unable to tag new topics with tags
tldr: before it was do the bot tutorial and the ability appeared.
Today: sadly: even though I got a nice certificate:
I still cannot see the ‘Tags’ box for adding tags.
Would be good to know what the requirements are. My recruitment ad doesn’t show up between all those others with tags (:wow is me: :p)