More efficient debugging – no more jumping through multiple layers of an application, in essence, better fault isolation.

Accelerated software delivery – multiple programming languages can be used thereby giving you access to a wider developer talent pool.

Easier to understand the codebase – increased productivity as each service represents a single functional area or business use case.

Scalability – componentized microservices naturally lend themselves to being integrated with other applications or services via industry-standard interfaces such as REST.

Fault tolerance – reduced downtime due to more resilient services.

Reusability – as microservice are organized around business cases and not a particular project, due to their implementation, they can be reused and easily slotted into other projects or services, thereby reducing costs.

Deployment – as everything is encapsulated into separate microservices, you only need to deploy the services that you’ve changed and not the entire application. A key tenet of microservice development is ensuring that each service is loosely coupled with existing services.

https://www.devteam.space/blog/microservice-architecture-examples-and-diagram/

Microservices - also known as the microservice architecture - is an architectural style that structures an application as a collection of services that are

Independently deployable

Loosely coupled

Organized around business capabilities

Owned by a small team

Highly maintainable and testable

The microservice architecture enables the rapid, frequent and reliable delivery of large, complex applications. It also enables an organization to evolve its technology stack.

https://microservices.io/