If your store is not ready yet and you do not want people to see your store under development or search engines indexing your store, you can put your website in Maintenance Mode.
For this go to page Shop Parameters->General and open tab Maintenance
On this page, you need to disable your store. Also if you need that store Front Office was available for you and for some other persons, you can enter IP addresses for which your website will be available:
And after enabling maintenance mode for all users except IP addresses you added will be available this page: