Microservices is an architectural approach to software development where an application is structured as a collection of small, independent services. Each service is designed to perform a specific business function and communicates with other services through well-defined APIs, often over a network. This modular design allows teams to develop, deploy, and scale each service independently, improving flexibility, fault isolation, and maintainability compared to traditional monolithic architectures. Microservices are commonly used in cloud-native and large-scale applications to enhance agility and support continuous delivery.