CDN not enabled in our website

We have configured our website(congruentsoftware). It was working fine, but CDN not enabled. In GTMetrix web page speed test, it is showing message " Use a Content Delivery Network (CDN) ". Please let me know how to enable CDN in my website. Appreciate your help. Thanks in advance.

You have your DNS set to :grey: DNS Only. You need to set it to :orange: Proxied in order to use the Cloudflare CDN.