HTML5 allows developers to create mobile apps that can be accessed across platforms without needing separate development for each device type. It has advantages over native apps such as lower development and maintenance costs since only one codebase needs to be created and updated. HTML5 also allows for rich multimedia content and has the potential to access native device features through APIs. As HTML5 adoption increases, it will help reduce platform fragmentation issues and provide a way for content to be more easily shared and accessed across different devices.