A Content Delivery Network (CDN) is a large distributed system of servers deployed at various location all across the world to serve digital content, CDN's offers website service providers to make use of multiple servers all over the world ready to deliver there content to end-users from their nearest location with fastest route. Apart from the website loading speed improvements using a CDN service also takes away load from the main origin server letting it work more efficiently.

MaxCDN is one of the leading CDN service providers and the one we use of this blog, normally they charge $39.95/year for 1 Terabyte of bandwidth but under a limited time promotion users can grab it for free.