Binary Tree Traversal | Postorder Traversal Explained with Example | Lecture 4

In this lecture, we cover Binary Tree Postorder Traversal in detail.

In this video you will learn:
- What is Postorder Traversal in a Binary Tree?
- Traversal order: Left → Right → Root
- How Postorder works using recursion
- Step-by-step dry run on an example tree
- Where Postorder is used (tree deletion, bottom-up problems, etc.)

This lecture focuses only on Postorder Traversal so that you understand it deeply before moving to Level Order and advanced tree problems.

📌 This is Lecture 4 of the complete Binary Trees playlist.

Next lectures will cover:
- Level Order Traversal (BFS)
- Binary Tree Problems on LeetCode
- Views of Binary Tree
- Binary Search Tree and more

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