Mastodon desktop website UI showing dropdown visibility options: Public (visible for all); Unlisted (visible for all, but opted-out of discover features); Followers only (visible for followers only); Mentioned people only (Visible for mentioned users only).
https://media.mstdn.social/media_attachments/files/109/508/675/134/869/687/original/a837c756a1c8e733.png