URL Shortening
From Market Ruler Help
URL Shortening services are ones which take a long, or complex URL, such as:
http://www.razzed.com/2009/10/19/tutorial-top-level-domain-names-cookies-privacy/
And converts it into a short one, such as:
http://razzed.com/t0
There are many businesses which specialize in URL Shortening services, and offer analytics which show graphs of usage, geographic information, and raw data of what clicks occurred when.