In this tutorial you generate a Contacts application which reads and writes data to a database. The application you create is a SPA (single-page application), in other words a desktop style application running in the browser. It is responsive, adapting to being used on mobiles, tablets or a desktop browser. Its user interface adheres to Google's Material Design guidelines.
After you have generated the application, you execute it to see how it works, and then have a look at the parts that make up the application.