Why do computers need a user interface?

User Interface is a channel of interaction between humans and computer, in other words, we can say that it is an environment in which a user interacts with a computer for completing a particular task with the help of elements created by User Interface like text, buttons, or images. These elements are used for building a design system which will lead to the user experience.

UI is very important because it is responsible for making or breaking your customer base as it increases the user involvement, creates accurate functionalities which result into a bond between customer and computer.