Make blog invisible

If you only want to block search engines, check “Discourage search engines from indexing this site” at Settings -> Reading in your blog’s Dashboard.

Please note, this simply asks the search engines to not index your site. It’s up to them to respect that. Most do, but if your site is publicly accessible, it could still be visited and indexed.

If you want your site to be completely private, use this plugin: https://wordpress.org/plugins/registered-users-only/

You’re welcome!