Yes, but the problem is that when you are working on your sites, things can get buggy. This is why, when you are working on your customized website, it is recommended to set maintenance mode. When your site is set to maintenance mode, it means users other than administrators cannot use or view your site while development is taking place. The site administrators, on the other hand, still have access to the site, so they can test it and make sure the site is fixed or is ready for launch.