Microservices are smaller and faster to test.

Microservice architecture gives developers the freedom to independently develop and deploy services.

They enable the continuous delivery and deployment of large, complex applications.

It enables you to organize the development effort around multiple teams. Each team is responsible for one or more single services. Each team can develop, deploy and scale its services independently of all of the other teams.

Starts the web container more quickly, so the deployment is also faster.

Code for different services can be written in different languages.

Microservices Eliminates any long-term commitment to a technology stack. When developing a new service you can pick a new technology stack. Similarly, when making major changes to an existing service you can rewrite it using a new technology stack.

The application starts faster, which makes developers more productive, and speeds up deployments

Improved fault isolation. e.g if there is a memory leak in one service then only that service is affected. The other services continue to handle requests. In comparison, one misbehaving component of a monolithic architecture can bring down the entire system.

https://about.gitlab.com/blog/2022/09/29/what-are-the-benefits-of-a-microservices-architecture/

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/