First of all, we need to understand what is the conversion rate. Observing conversion rate is important because those metrics will measure the success of a website, a landing page, a marketing campaign, or a small A / B test. A high conversion rate leads to a better ROI. Let's see the following formula: On the other hand, we also have a formula for CPA (Cost per action). Basing on these formulae, how do studies prove the relationship between website performance and conversion rate? Basing on these formulae, how do studies prove the relationship between website performance and conversion rate? In 2006, Amazon conducted the first study that shows a clear relationship between page load times and online customer revenue. It is concluded every 100 milliseconds of delay causes a 1% loss in Amazon revenue. In the recent study, Intuit also presented their findings on the Velocity website when they attempted to reduce page load times from 15 to 2 seconds, while also observing...