Lattice Theory is a branch of mathematics that studies the structure of lattices, which are abstract algebraic systems. A lattice consists of a set equipped with two binary operations, usually called "meet" and "join," that satisfy certain properties. These operations allow for the combination of elements in a way that reflects order and hierarchy. In Lattice Theory, elements can be compared based on their relationships, such as whether one element is less than or greater than another. This theory has applications in various fields, including computer science, logic, and information theory, where it helps in organizing and analyzing data efficiently.