????Google Website Optimizer Case Study: Daily Burn?? 20%+ Improvement (Tim Ferriss) ???????????????仯?????????20%?????汾??????????????????????

????Two Magical Words Increased Conversion Rate by 28%  “It’s free” ??????????????????????????28%?? ???????????????ж???????Щ??С??仯?????????????????

????Changing the Sign-Up Button from Green to Red  ????A/B????? CareLogger????????????????????????34????????

????Single page vs. multi-step checkout  ?????????????????????????????????????A/B???????????????????????????????????????á?