JPA is basically Java Persistence API. It’s a specification that lets you do ORM when you are connecting to a relational database which is Object-Relational Mapping.
So, when you need to connect from your java application to relational database, you need to be able to use something like JDBC and run SQL queries and then you get the results and convert them into Object instances.
ORM lets you map your entity classes in your SQL tables so that when you connect to the database , you don’t need to do query yourself, it’s the framework that handles it for you.
And JPA is a way to use ORM, it’s an API which lets you configure your entity classes and give it to a framework so that the framework does the rest.
