Usability scores characteristics, such as consistency and aesthetics in the user interface. Aesthetics is the visual appearance of the UI. Consistency is the use of techniques employed in the UI. Usability is the ease at which the users operate the application and make productive use of system. Usability is discussed in relation to the system interfaces, but it can just as well be applied to any tool, device, or rich system.

Usability addresses the factors that establish the ability of the software to be understood, used, and learned by its intended users. The application interfaces must be designed with end users in mind so that they are intuitive, are localized, provide access for differently abled users, and provide an excellent customer experience.