CDN stands for Content Delivery Network. A CDN refers to a group of geographically distributed servers that works together in order to deliver content very fast to the visitor of a website or app. With A CDN it’s possible to do quick transfers of the given assets to load content, including HTML pages, JavaScript files, stylesheets, images, and videos. The majority of the big internet service such as social media, Streaming, shopping, news-sites, and the like are served through CDNs.