Although the trial you create is live on the internet, it is blocked from being seen by the search engines.
Each trial is given its own portion of the Reason8 website with a unique address. If you wanted to show a third party what you have been creating you could give them the address so they can view it.
But without the address the content of the trial cannot be found on the internet. This provides the security to hide the content until you are ready but also the ability to view it as though it were a live page.