The Starter Parent POM defines key versions of dependencies and Maven plugins. It typically uses spring-boot-starter-parent as the parent in the pom.xml file:

<parent>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-parent</artifactId>
   <version>2.0.2.RELEASE</version>
   <relativePath/> <!-- lookup parent from repository -->
</parent> 

Spring Boot Starter Parent POM allows us to manage the following things for multiple child projects and modules:

• Configuration: Java version and other properties
• Dependency management: Version of dependencies
• Default plugin configuration: This includes configurations such as build plugins

It is an easy way to bring in multiple coordinated dependencies including transitive dependencies.

Let's see the Spring Boot auto-configuration.