Installing an SSL certificate doesn’t automatically make your website secure. You also need to configure your website to use it.
I see you’re using WordPress, which means you need to do two things:
- Change the Website URL in your WordPress settings to start with
https://
instead ofhttp://
. - Force all traffic to your website to HTTPS. You can do that with .htaccess rules as described here or use a plugin like Really Simple SSL to do that for you.