Search engines such as Google are the main tool for finding information. Even though the
internet is widely used by companies, such as Mustika Group, to increase sales through online
platforms, success still depends on efficient interface design. This research focuses on evaluating
user experience on the Mustika Group website using the Heuristic Evaluation method. The results
showed several problems, including unclear information, unclear company logos, and users'
difficulty in finding product information. The problem formulation includes difficulty for users to
detect services, lack of visual information about the company logo, lack of clarity regarding the
product. The aim of the research is to evaluate usability and provide recommendations to improve
user experience and website effectiveness. Research limitations involve the Heuristic Evaluation
method on the Mustika Group website with a focus on ten heuristic principles. The benefits of the
research include improved website usability, increased sales effectiveness, increased corporate
reputation and contributions to the usability and interface design literature. This research also
describes the subject and object of research as well as the System Usability Scale (SUS)
measurement method used. The result of the usability evaluation on the initial design obtained a
score of 65 with the adjective “OK” and grade D. After evaluation and re-design, the score
increased to 76 with the adjective “Good” and grade C. It is hoped that the implementation of the
redesign result can be carried out by website developers to increase overall user satisfaction.
Keywords: Heuristic Evaluation, Property, System Usability Scale, User Experience, Website.