Google Analytics & Website Optimizer
Understanding your Web site’s traffic is an essential element of any online effort. I love Google Analytics because it is a very sophisticated analytics service, it’s free, and it integrates with Google’s other great tools like AdWords and AdSense. If you’re not using it, I’d consider doing so.
Deepak Kumar‘s talk on Google Analytics and Website Optimizer to webmasters at the Google India SearchMasters ’09 conference. (See slides.) Found at YouTube via GoogleWebmasterHelp.