A listed page is a page that has been submitted to a domain and accepted by a reviewer. A listed page is publicly viewable and will show up in search results for anyone.
Not all listed pages have been assigned a quality tag, and although we try to ensure they are free of major errors, we cannot assure their correctness. You are encouraged to [arbital_proposed_edit propose] edits if you see something which you can improve (or edit directly, if you're trusted in that domain).