A class provides a blueprint for objects with attributes and behaviors. It allows software to more easily represent real-world entities. Objects created from a class can store multiple attribute values, like the name and age of a person. This is more efficient than using primitive types alone and makes software maintenance simpler. For example, a Person class could have id, name, and age attributes. Objects created from the Person class, like p1 and p2, could then hold data for multiple people.