Hours of SEO work and carefully researched PPC campaigns are practically worthless if the landing page
doesn't convert users -- or they get lost in the process somewhere else on the Web site.
Sarah suggests testing factors like your site's checkout process (if there is one), conversion click paths, as well as multiple image and text layouts to KNOW which features are working -- not just assume. She also offers a strategy for determining which site factors are most important for you to test, from products, to presentation to channel factors.