The viewer enforces asymmetric visibility rules. A user may have thousands of friends, but the Stories viewer allows for granular control:
The Ultimate Guide to the Facebook Stories Viewer Facebook Stories offer a dynamic way to share daily moments. They disappear after 24 hours. Millions of users interact with this format daily.
The explicit nature of the "Seen By" list creates social pressure. Unlike the News Feed, where "lurking" (viewing without interacting) is anonymous, the Story Viewer makes lurking visible. This has led to the phenomenon of "Ghost viewing"—the desire to consume content without alerting the creator.
You can control exactly who sees your content. Facebook provides three main privacy tiers.
Facebook Stories, Ephemeral Content, Social Media Architecture, Privacy Settings, Impression Tracking, User Interface Design.