Some people use Norton or Safe Web Lite browser addons. These people will see your site as being unsecured until a site is verified with Norton. As a website owner you need to make sure your site displays on every computer as a safe and secure site.
Even if you are on top of the Google results, some people will not click on your site if it does not appear safe.
An example of a secure site:
An example of the way an unsecured site will display:
We can create a Norton Safe Web account and verify the ownership of your site to make sure your site is displayed as a secure site. You can register your site with Norton yourself, or you can use our services to do this on your behalf.
While browsing sites, this icon will be displayed for unsecured sites with Norton:
This will display when your site is secured: