In this chapter, you learned about service discovery, externalization of configuration, and the API Gateway concept. We have also tried simple and short examples for each concept. Because Spring Boot is the code technology of this book, in our examples, we stuck to the implementation of these concepts in Spring Boot. Also, we have defined our first microservice, user registeration. It is in its initial stage, and it will evolve in terms of security, communication, and so on in the next chapter. In the next chapter, we will discuss how microservices should communicate with each other, and also our next service, financial service. We will also evolve the communication of a user registration microservice.