Definition

Content Delivery System – a system of geographically distributed servers designed to accelerate the delivery of web pages and files by routing user requests to the server that’s in the best position to serve them.

Information

CDN services try to improve the speed and availability of web pages and files. Speeds matters to marketers because of its impact on metrics like bounce rate and shopping cart abandonment, and thus profitability.  There have been many studies showing how each extra second (or fraction of a second) can cause a percentage of web page visitors to give up and leave.

There are many types of CDN services, ranging from expensive enterprise solutions to more accessible options that can be configured from WordPress plugins. ROI calculations for CDN services can get complex for larger organizations, but at a basic level it requires knowing the cost of different serving methods, and the marginal profit gained from better performance.

Related Terms

view all terms in the Web Hosting glossary or all terms in the Digital Marketing glossary

Sites

cdncalc.com – CDN price calculator

CDNfinder.com blog

CDN Planet blog

Articles

Why You Need a CDN for your WordPress Blog?
WPBeginner (October 8, 2014)

Here’s What The Current CDN Landscape Looks Like, With List Of Vendors
StreamingMedia.com (December 10, 2013)

10 Free CDN Services to Speed Up WordPress
WPExplorer (July 9, 2013)

7 Reasons NOT to use a Content Delivery Network
SitePoint (September 27, 2011)

7 Reasons to use a Content Delivery Network
SitePoint (September 22, 2011)

Why should I use Google’s CDN for jQuery?
Stack Overflow (February 1, 2010)

Best way to use Google’s hosted jQuery, but fall back to my hosted library on Google fail
Stack Overflow (July 18, 2009)

Which CDN is the best bang for the buck?
Quora

CDN market share in the Datanyze Universe
Datanyze

CDN Usage Statistics
builtwith.com

How Loading Time Affects Your Bottom Line
KISSmetrics