From the blog post for Day One shared journals, they do a great job of explaining why the feature exists and what to use it for. No obvious way to share a journal entry to anyone on the web though, right? I thought after being acquired by Automattic they might do more there.
@manton Around the time they launched to v2, before it even had a subscription, they were talking about features for making a web version of a journal. (Maybe that was also a v1 feature, I wasn’t a user at the time)