Non-HTTPS Sites to be Labeled “Not Secure” by Chrome
Here's the important part: this only matters if it's a site where you'd enter any sort of a login or credit card information. If "Joe's Blog" is not secure, there's no problem there because you're just there to read his pithy observations.
Now, if you go to a online retailer and it's not secure, do not make any purchases there as your personal information may be at risk.
Full story at Wordfence Security's blog