Tens of thousands of websites are going to find themselves labeled as unsafe unless they switch out their HTTPS certificate in the next two months.
Thanks to a decision in September by Google to stop trusting Symantec-issued SSL/TLS certs, from mid-April Chrome browser users visiting websites using a certificate from the security biz issued before June 1, 2016 or after December 1, 2017 will be warned that their connection is not private and someone may be trying to steal their information. They will have to click past the warning to get to the website.
This will also affect certs that use Symantec as their root of trust even if they were issued by an intermediate organization. For example, certificates handed out by Thawte, GeoTrust, and RapidSSL that rely on Symantec will be hit by Google's crackdown. If in doubt, check your cert's root certificate authority to see if it's Symantec or not.
Time to explore the options!