Usability testing is significant in software development as it evaluates how user-friendly and efficient a product is. By observing users interactions with a software application, developers can identify usability issues and areas for improvement. This process often involves techniques like think-aloud protocols and user surveys to gather feedback. Ultimately, usability testing ensures that software meets user needs and preferences, enhancing overall user experience and satisfaction. A product that’s easier to use is likely to see higher adoption rates.