What is the focus of usability testing in a software product?

Usability testing primarily focuses on how well users can interact with the software. This type of testing evaluates the user experience by assessing the ease of use, efficiency, and satisfaction provided by the software. It examines how intuitive the interface is, how effectively tasks can be completed by users, and how well the software meets user needs and expectations. By concentrating on user interaction, usability testing guides developers in making design choices that significantly enhance user satisfaction and productivity.

The emphasis is not on the software's performance under load, which pertains to performance testing. While the appearance of the interface can impact usability, the broader focus goes beyond aesthetics to consider overall user experience during tasks. Similarly, examining the complexity of the underlying code is relevant to software design and maintainability but does not directly address user interaction with the software, which is the core of usability testing.