Under the Service Component section in the above illustration, notice the values that are displayed.
HelloWorldModel says: Hello World! This is instance: fe95f477-e525-432b-9fed-9d65dba3f5d2 Resource type is: aem10/components/content/helloworld
These values are returned by a default AEM service. Once you understand all of the files and services that are created by Maven, you can use this project as starting point for your AEM 6.2 projects. To read this development article, click https://helpx.adobe.com/experience-manager/using/first-arch10.html.