Unlisted Demo Page
This page is unlisted: true. It is built, emitted and reachable at its own route — you are
reading it — but the unlisted-pages plugin strips it out of the content index, which is
what search, the graph, the explorer, RSS and the sitemap all read from.
That makes it “reachable if you know the URL, invisible if you don’t”. It is not a security mechanism: the HTML is public. For an actual secret you want encryption, and even then only with a real password.
Back to the visibility experiment.