Addresses are per site. Two sites can both have /about. Within a site, a page and a post can't share an address.
Unknown hostnames show "not found". A domain that isn't set up as a site never shows another site's content.
Drafts are private. A draft or scheduled item has no public address, and guessing one returns "not found".
Scheduled content goes live on its own at the scheduled time.
Withdrawn and never-published are different. Withdrawing keeps the fact that something was once live.
Comments are not built in. Posts that are shared to LinkedIn carry a "Discuss on LinkedIn" link, so discussion happens there.
The contact form saves first, then emails. Each submission is stored before delivery is attempted, and it goes to the site's contact email. If no contact email is set, the message is still stored with a note explaining why it wasn't sent. Visitors are told their message was received once it's saved. A hidden spam trap quietly ignores bots.
Tags are per site. Archives for a tag or month with no posts show "not found" rather than an empty page. Each post card's tags link to their archive.
Search is public and covers posts. Results pages aren't indexed by search engines, and sites without a blog have no search.
Each site has its own robots.txt and sitemap./ads.txt is served only for sites with an AdSense publisher ID, otherwise it shows "not found". The admin address is marked as not to be crawled.
Settings saves merge. Saving one part of a site's settings leaves the rest alone.
Knowledge Bases are private. Their entries stay as drafts and are searchable only by signed-in people with access, or by other platform apps holding a Product Manager token.