User experience (UX) goes beyond simply making the user interface attractive at the end of development. It’s about understanding user needs and supporting them in their tasks. In this talk, I will show you how applying simple and well-known fundamentals, along with an understanding of cognitive biases, can elevate your digital applications to the next level. I will explain the theory and demonstrate its application with clear, practical examples. You’ll realize that you’ve encountered these concepts as users yourselves. These tips are invaluable not only for developers but for all professionals involved in frontend design.