For this, the meaning and purpose of User Interface (UI) design should be defined at first. User Interface is the look and feel, the presentation and interactivity of a website or a web application.  It includes the basic design elements that need to be present in order to for someone to navigate your site and make decisions. It is the ever-evolving relationship between users and the system that they are using. UI design also determines how a website interacts with users, the website’s overall design and how information is presented on the website.