Distance is the enemy of speed. A CDN removes it.
Without a CDN, every visitor's browser has to fetch your assets from wherever your server is. With one, they're served from the nearest edge location. The difference in load time can be seconds.
THE NETWORK
Your assets, everywhere at once.
A CDN maintains a network of servers (edge nodes) distributed globally. When a visitor loads your site, assets , images, CSS, JS, fonts , are served from the nearest node rather than your origin. That cuts the physical distance data travels and the time it takes to arrive.
THE CONFIGURATION
Setup matters as much as the network.
Most sites using a CDN are using it badly , assets that should be cached aren't, cache TTLs are too short, purging isn't configured and origin requests leak through unnecessarily. Good CDN configuration maximises cache hit rate and minimises origin load.
Configure My CDN