How a CDN works
A Content Delivery Network (CDN) is all about making a website load faster for all users, wherever they are in the world.
This is done by storing (caching) copies of your website on servers at the network edge. For example, if your website is hosted at a UK data centre, there might be a delay if you try to access that site from the USA. So a copy of your website is stored on a server closer to the user, called a Point of Presence (POP).
Multiple copies of your site’s data is stored at different POPs throughout the world, so your site will load faster in remote places. Your users will navigate your site more efficiently, wherever they are.
While it’s good for users, it also helps your website in other ways. Search engines love fast-loading sites so there’s an SEO benefit to having a CDN.