Naive Set Theory is a branch of mathematics that deals with the concept of sets, which are collections of distinct objects. It allows for intuitive reasoning about sets without the need for rigorous formalism. In this approach, sets can contain anything, including numbers, letters, or even other sets, and operations like union, intersection, and difference are easily understood. This theory is foundational for more advanced mathematical concepts and is often used in everyday reasoning. However, it can lead to paradoxes, such as Russell's Paradox, which arise from unrestricted set formation. Despite these issues, Naive Set Theory remains a useful tool for understanding basic set operations and relationships.