Google started to mark pages, that loaded with HTTPS on Google Chrome, as “secure” in October of last year. Also, some of the HTTP pages were marked as “unsecured”. These actions were done to show that safety of Google Chrome users is the priority. It was now announced that this year Google is going further and in July 2018 all of the HTTP websites will be marked as “unsecured”.
This article should help you, if you are worried, how these changes can affect your website and what can you do to protect your users.