Event-driven microservices are a software architecture pattern where services communicate with each other by generating and consuming events. This approach allows for a loosely coupled and highly scalable system, as services can react to events in real-time without needing to know the specifics of other services. Events are typically small, immutable pieces of data that convey information about a specific action or state change within the system.

One key benefit of event-driven microservices is that they enable better fault tolerance and resilience. If a service goes down, events can be stored in a message broker and processed later when the service is back online, ensuring that no data is lost. Additionally, this architecture pattern promotes better isolation and independence of services, making it easier to update or replace individual components without affecting the entire system.

Overall, event-driven microservices are well-suited for complex, distributed systems that require high levels of scalability, flexibility, and responsiveness. By leveraging events as the primary means of communication between services, organizations can build robust and agile architectures that can adapt to changing requirements and handle large volumes of data and traffic efficiently.