Google takes SSL real seriously, flagging sites without them, and, now, as of a few days ago, posting full-page warnings to users accessing websites with SSLs that aren't logged in the public Certificate Transparency log.

What does this mean?
Basically, Chrome is the first browser to enforce the Certificate Transparency Log Policy. According to this policy, Certificate Authorities (CAs) — the entities that issues SSL certs  — must publish public logs with the SSL certs issued each day. This keeps tabs on any mis-issued certs. Most reputable CAs are doing this already.

So what happens?
Chances are - nothing since most reputable SSL providers have already started logging certs. But, if you have a non-logged SSL certificate, Google Chrome will post a big old warning to visitors - similar to an expired certificate. If this happens, you will need to contact your hosting provider to get the situation fixed.