High demand websites will greatly benefit using CDN
A content delivery network (CDN) is a system of distributed servers (network) that deliver webpages and other web content to a user based on the geographic locations of the user, the origin of the webpage and a content delivery server.
To minimize the distance between the visitors and your website's server, a CDN stores a cached version of its content in multiple geographical locations (also known as points of presence or PoPs). Each PoP contains a number of caching servers responsible for content delivery to visitors within its proximity.
In essence, CDN puts your content in many places at once, providing superior coverage to your users. For example, when someone in London accesses your US-hosted website, it is done through a local UK PoP. This is much quicker than having the visitor's requests, and your responses, travel the full width of the Atlantic and back.
If you would like more information and how you can implement CDN for your content, please contact us at firstname.lastname@example.org