What is Google Website Optimizer?
 

Well,
Using split testing software like Google Website Optimizer is a powerful way to increase your website�s conversion rate (that is, its ability to turn visitors into customers).
Many of the web�s most powerful companies, including Amazon and Google, use this technique.
What you want to say about it?

what do we check in Google Website Optimizer....how its help in improving our conversion rate.

Google webmaster tool :D

Google Website Optimizer allows webmasters to test entire pages, known as A/B testing or page elements, known as Multivariate testing such as Headings, images or body copy.

Website Optimizer is an easy-to-use tool for testing site content that delivers actionable results.

Google uses this technique? but how?