"User experience testing often scares entrepreneurs and marketers. It seems like a daunting task, especially if you have lots of products or lots of pages on your website.
However, it’s essential if you want more conversions.
ClickMechanic conducted extensive user experience testing before relaunching its website. The testing resulted in an impressive 50 percent increase in conversions."
https://www.crazyegg.com/blog/user-experience-testing/