Microservices architecture is a software development approach that structures an application as a collection of small, independent services, each running in its own process and communicating with lightweight mechanisms, such as APIs. This approach has become increasingly popular due to its numerous benefits, including increased flexibility, scalability, and fault tolerance.

In a microservices architecture, APIs, service discovery, and registry play crucial roles in facilitating communication and managing the services. APIs provide a standardized way for services to communicate with each other, while service discovery allows them to locate and communicate with each other dynamically. Registry, on the other hand, enables services to register and discover other services and manage metadata and configurations.

https://dzone.com/articles/why-apis-service-discovery-and-registry-are-crucia