Description: A ‘Handler Message’ in software development is an object used to send information between different components of an application, facilitating communication and task synchronization. This object is sent to a ‘Handler’, which is responsible for processing messages on a specific thread, usually the main UI thread. Messages can contain data, instructions, or commands that the Handler must execute. This architecture allows applications to handle asynchronous operations, such as updating the user interface in response to events or executing background tasks without blocking the main thread. Handler Messages are fundamental for maintaining the smoothness and responsiveness of applications, as they allow for the separation of business logic and presentation, thus facilitating a cleaner and more efficient design. Additionally, messages can be used to send information between different threads, which is crucial in an environment where multiple tasks may be running simultaneously. In summary, the Handler Message is an essential tool in application development, enabling effective and efficient communication between components and enhancing the user experience.