This is a fantastic tool! It is the next step for analytics! This tool allows you to do many different kind of tests on your website (A/B, MVT, and so on) + also allows you to target your visitors with relevant content to them! In my opinion it is a must!
Omniture Test&Target™ gives marketers the necessary capabilities to continually make their online content and offers more relevant to their customers—yielding greater conversion. Test&Target provides an intuitive interface for designing and executing tests, creating audience segments and targeting content—all from a single application. Omniture Test&Target is part of the Omniture Online Marketing Suite of applications for online business optimizations.
Read more here Omniture Test and Target
