“The microservice architectural style is an approach to developing a single application as a suite of small services,
each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API.
These services are built around business capabilities and independently deployable by fully automated deployment machinery.”
출처 : https://martinfowler.com/articles/microservices.html
즉 배포 가능한 스스로 돌아가는 작은 용량의 API라고 파악이 된다