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Microservices is a software development approach that breaks down applications into independent services that communicate with each other. This allows for faster development, easier scaling, and better business continuity. 
How it works
Services: Each microservice is a small, independent service that handles a specific task or application feature. 
Communication: Microservices communicate with each other using well-defined APIs. 
Deployment: Microservices can be deployed independently, so updates can be made without rebuilding the entire application. 
Scaling: Microservices can be scaled individually, so only the components that need it are scaled. 
Data: Each microservice is responsible for its own data persistence. 
Benefits
Faster development: Microservices can be developed faster than traditional monolithic applications. 
Easier scaling: Microservices can be scaled more precisely than monolithic applications. 
Better business continuity: Microservices can be located across different geographical locations, so a problem in one location won't take down the entire system. 
According with amazon:
https://aws.amazon.com/microservices/