In tradition approach, implementing Data Access Layer makes lots of boilerplate code. Spring JPA is a part of Spring Data, helps us improve our codes and reduce efforts for development and maintenance. Spring JPA supports us the ways to write interface for repositories and custom finder methods, the implementation will be done automatically by Spring Framework.
About MariaDB, it is an open source leader, provides the solutions to run on all infrastructure.
So in the tutorial, JavaSampleApproach shows you how to create Spring JPA MariaDB application using Spring Boot.