By making your post private, your post will be visible only to the users of the blog. To make your post private, follow thses steps:
1) Go to your dashboard.
2) Start a new post or edit the existing post.
3) When publishing the post, in the right side of the page, you will find this option “Keep This Post Private”.
4) Tick this option and then publish the post.
5) This post will be visible only for the users of the blog.