A UI or User Interface is every single interaction of a software with the users. The UI is a big part of developing a program. Without an attractive view, the UX (User experience) and usability of that software will go down.
Interface design is made totally for the public. So if the public don’t like it, your development won’t work. That’s why it should have some elements like these ones:
- Input Controls: buttons, text fields, checkboxes, radio buttons, dropdown lists, list boxes, toggles, date field
- Navigational Components: breadcrumb, slider, search field, pagination, slider, tags, icons
- Informational Components: tooltips, icons, progress bar, notifications, message boxes, modal windows
- Containers: accordion
The key for a good UI is to keep it simple. A page, program or desktop with a lot of elements is not good-looking. Also the colors and typography are important. Attractive colors and different sizes of letters will please the users eyes and gain more views.
Sources:
http://bokardo.com/principles-of-user-interface-design/
https://www.usability.gov/what-and-why/user-interface-design.html
