Tree Traversal is a method used to visit all the nodes in a tree data structure. It allows us to access each node systematically, which is essential for tasks like searching, sorting, or modifying the tree. There are several ways to traverse a tree, including in-order, pre-order, and post-order traversals, each serving different purposes. In in-order traversal, nodes are visited in a left-root-right sequence, which is useful for binary search trees. Pre-order traversal visits nodes in a root-left-right order, often used to create a copy of the tree. Post-order traversal follows a left-right-root sequence, commonly used for deleting trees or evaluating expressions.