Web applications within current digital times require high scalability together with flexibility as well as fault tolerance capabilities to meet growing user needs effectively. Technical applications built using monolithic design present problems with maintenance difficulties and limits for scalability and system durability which results in performance slowdown when applications become increasingly complex . Microservices Architecture (MSA) demonstrates its status as an optimal solution for building scalable web applications through its service-oriented framework which enables independent functionalities to exchange data via APIs along with self-contributing capabilities. The research examines how microservices architecture delivers benefits throughout web application development together with its fundamental concepts and implementation challenges and best capabilities. The paper includes a different analysis between monolithic and microservices architectural approaches and demonstrates real-world success stories of organizations adopting microservices