Web Usability - How to define usability? How, when, and where can you improve it? Why should you care? Also, will show the results of testing done on UNL and CASNR websites. Usability is the ease with which people can perform a pertain task on an object or system to achieve a particular goal. Whether it’s making coffee in a coffee machine or finding information on a website, does the interface allow people to do what they need to? See website below for additional agenda information.