No, not what books are you enjoying, but what specifically is this page, that you're reading right now at this very moment.
On other sites such as forums etc, we may be involved in a "thread". What single word or short phrase would best describe the interactions we have on Stack Exchange.
For more context, I was posting a comment on another site's Meta, and wanted to say:
As mentioned elsewhere on this ...
- "thread" doesn't work, because we're not a forum
- "Q&A" just doesn't seem right