everybody help me !!!

Question

hi! I have a question, everybody  help  me, please! I  don't  understand  for  structs function. "classes are useful for implementing object. However, there may be times when an object needs to behave like one of the in-built data types to facilitate faster allocation without much of an overload an overhead of references. To achieve this,we can use tructs.". How do me understand for this ?