User Interface Design

User Interface Design is the process designers use to build interfaces in software or computerized devices, focusing on looks or style.​

To design user interfaces best you should think about how users judge quickly whether the website or app is easy to use and pleasant to look at, without any frustration whilst using them.​
User Interfaces should always communicate brand values to make them more trustworthy to the users.​

There is a lot of time and thought put into designing a user interface and you have to get it right for your business/company so you have to make sure you get the right people for the job.