Starting in October 2017, Google Chrome will show a Non-Secure warning in your website. Specifically who uses enter data on a HTTP page. So, as a example your login or checkout pages will show this warning.
At Classipro, our recommendation to all our clients is to setup a SSL certificate in your website to make it HTTPS as soon as possible to avoid disturbing your users with this warning because at the end, google will mark all the HTTP pages as non-secure in the near future.
If you have any questions, don’t hesitate to contact us!