In today's society, usability is an essential principle for developers to handle when developing any system, webpage, or e-service. Usability is important for all types of users. However, it seems that young adults are more or less likely taken for granted when developing usability for their target group. Thus, this study will identify what is important for young adults when usability is required. A case study has been performed to gather data through a qualitative study, including a think aloud-test followed by a semi-structured interview. A theoretical framework has been created, that builds on different aspects of usability: learnability, accessibility, comprehensibility, navigation, flexibility, and discoverability. The study has chosen to focus on these aspects since they are relevant for what the study aims to examines. By using the theoretical framework and analyzing the results, the study reached its conclusion. The conclusion of the study is that the aspects of usability that are important for young adult sare: comprehensibility, accessibility, and navigation.