POJO is short for Plain Old Java Object, which is a normal Java class used to hold data like a container for request/response.
POJO classes help in converting between Java objects and JSON data, making the code clean, readable, and manageable in API testing.
ObjectMapper, a class from Jackson JSON library, assists in converting data between Java and JSON manually, simplifying the process.
Rest Assured can automatically handle conversion between Java objects and JSON using POJO classes, eliminating the need to write manual JSON in API testing.