Application modernization is the process of updating legacy software applications to improve performance, scalability, and security by integrating them with modern technologies. This may involve refactoring, replatforming, or completely overhauling old systems to make them compatible with cloud environments, microservices, and APIs. Modernizing applications enhances their efficiency, reduces technical debt, and enables businesses to remain competitive by leveraging new functionalities and delivering better user experiences. It supports smoother integration with other modern systems, increases agility, and ensures that businesses can scale and innovate more effectively.