Since the birth of the Internet more than 50 years have passed to the place where we are now. Only real visionaries predicted that the technology of global computer networks would develop so dynamically. These days the Internet is an extremely important tool in the hands of not only marketers, businessmen but also ordinary people. New websites, online stores, web applications - we use them every day. What about their functionality, quality of use? Do they help us in our daily life? Are they user-friendly? Today, not only technology is important, but most of all users and UX methodology.