“Cross-Platform” refers to software that operates across different operating systems and hardware platforms. This allows developers to write code that runs on Windows, macOS, Linux, iOS, and Android without significant modifications. Cross-platform technologies save time and costs by eliminating the need for separate development processes for each platform, thereby increasing the reach of applications.

Common frameworks for cross-platform development include React Native, Xamarin, and Flutter. These provide tools that support cross-platform compatibility. Challenges include ensuring performance and user experience across all platforms and handling platform-specific differences.

Cross-platform development is crucial in modern software development as it offers flexibility and reduces time-to-market.