Human-computer interaction (HCI) plays a vital role in software development by focusing on the user experience. HCI studies the design, evaluation, and implementation of user interfaces, ensuring they are intuitive and meet user needs. Proper HCI practices improve usability, enhancing user satisfaction and reducing training time. For developers, understanding HCI principles helps create products that are more accessible and engaging, ultimately boosting adoption rates. Effective HCI design is key to anticipating user behavior and preferences, contributing to the overall success of a software application.