ORM (Object-Relational Mapping) is a programming technique that relates objects used in databases to classes and records.ORM simplifies CRUD operations by allowing developers to add, read, update, and delete data through objects, rather than using direct SQL code.Advantages of ORM include easier code, database neutrality, protection from SQL injection, and easy testing.Popular ORM libraries include Hibernate (Java), Django ORM (Python), Entity Framework (C#), and SQLAlchemy (Python).