What do hidden pages look like?
When you hide a page from navigation, it will only appear in the menu when the page is being visited. However, it is still a live page.
You can see this behaviour by visiting hidden pages on this site.
Links to hidden pages
Links to the page will still work. Hiding a page in navigation is not the same as removing it.
Remember that automatically created overview pages might still show a link to the page. Make sure your content doesn't appear on the overview by opting to hide both from overview and navigation.
Overview pages - EdWeb Support wiki [EASE login required]
Practical guidance
Hiding content in navigation - EdWeb Support wiki [EASE login required]