Component-based development is a software engineering approach that focuses on building applications using reusable components. These components are self-contained units of functionality that can be easily integrated into larger systems. This method promotes efficiency, as developers can leverage existing components rather than creating new code from scratch, leading to faster development cycles and reduced costs. In this approach, components can be independently developed, tested, and maintained, which enhances collaboration among teams. Popular frameworks and technologies, such as React and Angular, support component-based development by allowing developers to create modular user interfaces. This modularity also simplifies updates and scalability, making it easier to adapt to changing requirements.