Microservices also known as microservices architecture. An application as a collection of services that are:

1. Highly maintainable and testable
2. Loosely coupled
3. Independently deployable
4. Organized around business capabilities.
5. Easy and risk free to change.
6. Small scalable components.
7. Reduces risk during deployment.

From this way you have to understand how a monolithic application is decomposed into small tiny micro applications which are packaged and deployed independently.

The microservice architecture enables the continuous delivery/deployment of large, complex applications. It also enables an organization to evolve its technology stack.