On July 1, Google is making some security updates to the Chrome browser that could affect the way your website looks to viewers. See this article for an explanation.
When someone uses the Chrome browser to go to your website, you want it to have this "secure" label in the navigation bar:
Before July 1, 2018, if you do not have SSL enabled, viewers using the Chrome browser may see this exclamation point label.
After July 1, 2018, if you do not have SSL enabled, viewers using the Chrome browser may see this "not secure" label.
This change will only affect the look of the navigation bar, and it won't stop people from viewing your website. I recommend that you take care of it, though, because the "Not secure" label is a bad look.
What to do:
Make sure to have your site's webmaster enable SSL so that Chrome viewers see the "Secure" label. If you maintain your own website, using the website builder platform, "Weebly", there are instructions here for how to do this. It's not a complicated procedure.