????Google Website Optimizer Case Study: Daily Burn?? 20%+ Improvement (Tim Ferriss) ???????????????浠�?????????20%?????姹�??????????????????????

????Two Magical Words Increased Conversion Rate by 28%  “It’s free” ??????????????????????????28%?? ???????????????卸???????些??小??浠�?????????????????

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

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