That is a little unsettling for yours truly... 'tracking cookies'? Aren't tracking cookies supposed to be non-gratia from a web-security standpoint?
Seriously, -I am just curious the advantages here of having a google tracking system.. I see that many sites are using "urchin.js". -Why?
I can think of several reasons:
Perhaps you want to know what geographic location your visitors are coming from.
Perhaps you want to know users on different network connection speeds to determine the right application technologies for the job
Perhaps you want to know how many people are hitting (requesting) a certain page
Perhaps you want to know the bounce rate for a particular page, which may lead to a re-design or revised content
Perhaps you want to know what browser flavors your visitors are using
Probably the most important...Google Analytics is free. The actual UTM is part of the commercial solution which also kicks...I'm currently using it on my employer's website.