I noticed that there are no recent inquiries or complaints about load speed or performance issues with Zoho Sites websites.  However, I wanted to understand what Zoho has done to ensure that speed remains optimized, images are compressed and lazy loaded, performance remains "A" rated with GTMetrix and Google Insights, and otherwise best-practices of website performance are implemented for the best user experience.

I'd also like to understand Zoho's caching and whether using CloudFlare or some other CDN is necessary.

The more information the better.  Our website, ai.law, gets up to 40,000 visitors a month so I'd like to ensure that, if we switched, the user experience would be top notch.  What are best practices we should follow?  If we did experience speed/load time issues, do we have access to any code to implement changes?