The Drupal 8 Shield module allows you to protect your site using a simple htaccess authentication. It’s great for sites that you are working on that you don’t want the world (or Google) to see yet. This way you can send the site to a client or anyone really to test and just provide them the username/password to view the site. Once it’s ready to go, you can launch the site and remove this module.

If you have ever wanted to password protect your Drupal site, the Shield module will help with that!