https://www.theverge.com/2018/7/24/17603126/google-chrome-unencrypted-not-secure

Google’s Chrome Browser is now listing all unencrypted sites as explicitly “not secure,” beginning with today’s release of Chrome 68. The change applies equally to all HTTP sites, which will now display a “Not Secure” image in the address bar. HTTPS-enabled sites are unaffected by the change.

First announced in February, Chrome’s design shift is the latest move in a multipronged push by Google for more encryption on the web. Login sites have displayed similar “not secure” warnings since 2016, with gradually escalating alarms for expired certificates. Google has also subtly boosted HTTPS-enabled sites in search rankings since 2014, a significant incentive for webmasters to adopt the protection.