It means that if you try to access the "
http://" version of this site, the server will just redirect you to the "http
s://" version.
Of course, if your browser shows a warning when you try to access an unencrypted "
http://" site, then this will pop up
before the redirect has a chance to happen. So either you can open the "http
s://" site directly, or you allow the access to the "
http://" site
once, which will then redirect you to the "http
s://" site anyway. And, since your browser will remember the "301 Moved Permanently" redirect that it received from the server, the next time that you try to open the "
http://" site, your browser will open the "http
s://" site right away... 😏