User experience & user interface design
The examples below demonstrate the most common for the modern market definition of UI & UX, — digital interface structuring and information architecture behind it.
For me, as a long-standing visual professional, user experience design is a bit broader notion. User experience is at the core of any purposeful design no matter the medium. Not only is it a human-centered digital spaces structuring, but also any other information rearrangement, portioning, and accentuating based on the target audience specifics; supported by overall ergonomics, psychology of colours, composition, and visual rhythm perception.
A quick illustration of responsive prototyping. Clickable prototype >>>