Thanks Justin. I think the single Tag name is the first Tag Name that the writer chooses when tagging one's story! I found this out because I''m obsessed with data / information and had a look at my own tagging. For some of my curated stories, the single Tag name is NOT the tag/topic name they were curated under, but they definitely are the first tag I chose. This is significant for writers I think, i.e. choose your first Tag Name wisely!