Beginning in July-2018, with the release of Chrome 68, web pages without HTTPS will be marked as “not secure”.
Apple, Mozilla and Microsoft have already restricting functionality to only HTTPs. And for good reason, without HTTPS, your visitors are not protected from malware, malicious code or simply from being spied on as they browse your content.
Cloudflare’s got an amazing blog post that busts some comHTTPs myths and provides tools to check your site.
And of course, Google’s provided resources to ensure site owners are compliant.