Last September, Google published a notice on its security blog (here). In it, Google said that effective this month (January, 2017), it will "mark HTTP pages that collect passwords or credit cards as non-secure, as part of a long-term plan to mark all HTTP sites as non-secure."
Note that it's not marking webSITES, only webPAGES. So, if a portion of your website isn't collecting secure information, you're fine.
Also note that if your website isn't collecting such information, you're also fine.
But if you are -- and when you pull up your webpage and it starts with "http" (without the quotes) in the address bar, you're going to want to get an SSL certificate and start using HTTPS -- ASAP.
Clixk here to learn more about SSL.