Has anyone found any documentation or research about what data is transfered to Google Analytics when it's added to a site. The main thing I'm wondering about is post data, but the details of exactly what is sent would be useful.
I'm considering implementing it on a sites that have a lot of private data on them. I'm wondering what data Google will capture, if any. (The sites are login only.) I'm needing proof so I can provided to the users.
Google Analytics collects the following information through the default implementation: Number of users. Session statistics. Approximate geolocation.
This kind of information also includes things like the type of device or browser used; how long, on average, visitors spend on their site or app; or roughly where in the world their visitors are coming from. These data points are never used to identify the visitor or anyone else in Google Analytics.
The official information can be found here
The visitor tracking information that you can get in the Google Analytics reports depends on Javascript code that you include in your website pages, referred to as the Google Analytics Tracking Code (GATC). Initial releases of the GATC used a Javascript file called urchin.js.
That script is then discussed in detail in that blog, and Google Analytics Help group can also provide some details.
a More detailed list of what that javascript collect is listed here.
I found the official google documentation here:
http://code.google.com/apis/analytics/docs/tracking/gaTrackingTroubleshooting.html
i also found this very discussion VERY useful:
http://www.google.com/support/forum/p/Google%20Analytics/thread?tid=5f11a529100f1d47&hl=en
helped me find out WTF utmcc actually DID
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