Easy-to-use interfaces are essential for software success because they enhance user experience and accessibility. When users can navigate applications intuitively, it leads to greater engagement and lower frustration levels. This not only encourages user retention but also drives positive word-of-mouth recommendations. Furthermore, effective interfaces simplify complex tasks, thereby increasing productivity and satisfaction. It's important to note that software with complex or confusing interfaces may easily lose users to more user-friendly alternatives. Therefore, prioritizing design and usability is crucial for software to thrive in a competitive market.