UI/UX
UI and UX develop very different skills but work firmly hand in hand, as they are both crucial. UX stands for user experience, which focuses on how something works and how people interact with it. UI refers to user interface, which focuses on the look and layout. Both UI and UX designs must be perfectly executed and aligned with pre-existing user expectations to create an excellent user interface/experience. When those are aligned, the results can be astounding.