User testing has evolved over the years. The earliest seed of UX testing was planted by Frederick Taylor with the 1911 publication of his landmark Principles of Scientific Management.
Although important strides have been made, there are still five common defects that often show up in website bug testing. These are poor user interface, login credential failure and email deliverability as well as finding critical functions and clumsy or unworkable checkout process.
Customer interest and successful conversion depends on how easy it is to move through your site. A well designed customer journey is vital if you want to increase your conversion rate.