From July on, Chrome will brand plain old HTTP as “Not secure”

As more and more websites offer access over encrypted HTTPS, Chrome will soon brand any site served up over plain, unencrypted HTTP as "Not secure." Chrome 68, due for release in July, will start sticking the "Not secure" label in the address bar, as a counterpart to the "Secure" label and padlock icon that HTTPS sites get.

This is a continuation of a change made in January of last year where Chrome would brand HTTP sites with password forms as being "Not secure."