The document discusses Object Relational Mapping (ORM) in Django. It begins by explaining that ORM provides an API that allows accessing databases in an object-oriented style, making the database more transparent. It then provides examples of how to define models by inheriting from Django's Model class and adding fields. Various field types like CharField, IntegerField, DateField are demonstrated. It also shows how to define relationships and primary keys. The document concludes by explaining how to perform CRUD operations on models in an object-oriented way using Django's ORM APIs.