User experience design - Wikipedia
https://en.wikipedia.org/wiki/User_experience_design
UX designers perform a number of different tasks and therefor use a range of deliverables to communicate their design ideas and research findings to stakeholders.
What is UI design? What is UX design? UI vs UX: What's the difference
https://uxplanet.org/what-is-ui-vs-ux-design-and-the-difference-d9113f6612de
What is UX Design? "UX" stands for "user experience." A user's experience of the app is determined UX design is particularly interested in user expectations. All of the experiences and interactions that...