Yes, you hear it right !! You can make WordPress site private. There can be several reasons for the same. When you want to create a family-blog joined by all your family friends & relatives, all over the globe, you need privacy from rest of the world. One can need private blogs for team members to share project related views; in some business; for students to create a single-access point to collect notes or for special customers who are granted special privileges etc. As like this, you can have your own reason to make WordPress site private.