There are often three reasons why you might not be able to view your content:
Guest Permissions disabled: If Guest Permissions are disabled, that will cause your item or page to either not display when not logged into the site, or it will ask the user to log in before they can view the content.
Item or page not saved: Not saving your work may also cause changes not to show on the site when not logged in.
Item or page still in Draft mode: You may have saved and completed your work, but the page or item still needs to be published to live view.