User interface (UI) design is the process designers use to build interfaces in software or computerized devices, focusing on looks or style. Designers aim to create interfaces which users find easy to use and pleasurable. UI design refers to graphical user interfaces and other forms—e.g., voice-controlled interfaces.A user interface is the point of interaction between humans and computers. User interface design is the process of designing how these interfaces look and behave. Imagine you’re using an app on your smartphone to book flights. The screens you navigate, the buttons you tap and the forms you fill out are all part of the user interface.
You can’t design the user interface for a product without knowing who will be using it and what they’ll be using it for. The UI designer will start by getting familiar with the project brief in order to understand the target audience they’re designing for and the purpose of the product. UI designers might conduct competitor analysis to see what other brands operating in the same space are doing. This helps you to understand what your users expect when interacting with certain products, allowing you to design interfaces that feel familiar and are therefore easier to use.