Set theory, a branch of mathematics, revolves around the exploration of collections of distinct elements known as sets. It involves understanding the fundamental concepts of sets, such as elements, subsets, and set operations like union, intersection, and complement. This field also delves into various types of sets, including finite, infinite, countable, and uncountable sets. Advanced set concepts such as Cartesian product, power set, and partitions are also explored to extend the understanding of set theory and its applications.