Spring Boot
Spring Boot is an open-source Java-based framework used to create stand-alone, production-grade Spring applications with minimal configuration. It simplifies the setup and development of Spring applications by providing defaults and auto-configuration, allowing developers to focus on business logic rather than infrastructure. It includes embedded servers like Tomcat or Jetty, making it easy to deploy applications as executable JARs or WARs.
Developers should learn Spring Boot when building microservices, web applications, or REST APIs in Java, as it reduces boilerplate code and accelerates development with features like auto-configuration and starter dependencies. It is ideal for enterprise applications requiring scalability, integration with Spring ecosystem tools (e.g., Spring Security, Spring Data), and cloud-native deployments, such as with Docker or Kubernetes.