Readers never see a half-published site. The Releases page lists every release with what it changed, page by page and line by line, and any earlier release can be put back live as a new one. Each page has a full history of its revisions, showing what restoring one would change.
Preview shows the drafts as readers would see them, and an expiring preview link can be shared with people outside the workspace. The whole site or one page can be saved as a PDF.