The journey is kept in your browser for this tab only, and closing the tab clears it. Nothing about your reading is stored on a server.
Copying a link is the one exception, and only because you asked for it. The link carries the route itself rather than a reference to anything stored here, and it rides in the part of a web address that browsers never send to a server — so even then it travels between you and whoever you give it to, not through this site. Posting one publicly does publish what you read, to the platform and to anyone who opens it.
Pages that are not verses — the atlas, the topic charts, the method page — appear as markers showing where the route passed through, since there is no verse to list.
References follow the King James Version, matching the versification used across the site.