Microservices are a software architecture approach where an application is divided into small, independent and self-contained services that communicate with each other through APIs. This allows for faster development, deployment and scalability.
Spring Boot is a microservice-based framework that makes a production-ready application in significantly less time. By using Spring Boot, you can make your microservices smaller and it will run faster. For this reason, Spring Boot has become the standard for Java microservices.