This "periodic table" is a useful at-a-glance look that the multiple features and functions of Google Analytics. Google Analytics is a free website analytics package which produces a huge amount of useful historical visitor and visitor behavior data for your websites, including integration with Adwords. A person can literally spend hours diving into Google Analytics for data... lot's of data.
Click the image to see the original version, which is rather large!
You can view an updated version of the Periodic Table of Google Analytics here.