This document discusses how multivariate testing (MVT) was used by Orange, an online telecommunications company, to improve the performance of their website. MVT analyzes thousands of variations of web page elements like images, text, layouts, and calls to action to determine which combination performs best. For Orange, testing different creative designs for their shop page found a version that increased click-through rates by 75% compared to the original. MVT allows companies to continuously test and improve their websites based on how customers actually respond, rather than relying only on assumptions or opinions.