Have you ever wondered why some companies like Airbnb are successful while others are not? Their mobile application was downloaded over 50 million times in Google Play Store and received excellent app scores 4,6 stars from almost 1 million users. Of course, there are many reasons behind product success. I am 100% sure that one of them is a User Experience. What does it mean? For this article's purposes, I have reached for the definition of User Experience from Nielsen Norman Group (guru of approach UX Design).