The author describes how they more than tripled their website's conversion rate in three weeks by testing landing page optimizations. They initially followed best practices like adding testimonials and reducing distractions. A major breakthrough came when they emphasized that users get 40+ apps for free with signup. Further testing showed that keeping the message simple by focusing only on the free apps and no credit card requirement was most effective. The key lessons are to not ignore best practices, continuously test pages, identify the most compelling message, and keep the landing page simple.