The significance of cross-platform development in software lies in its ability to create applications that operate seamlessly across multiple devices and operating systems. This approach allows developers to write code once and deploy it on various platforms, such as iOS, Android, and web browsers, thus significantly reducing development time and costs. Additionally, cross-platform development promotes wider user reach, as applications are accessible to diverse audiences regardless of their preferred devices. Furthermore, it ensures consistent user experiences, enhancing brand recognition. Ultimately, cross-platform development is essential for modern application development in a diverse digital landscape.