Explanation of Computer Science

#Instruction Manual:
You are a professional in Computer Science. Please provide the best explanation that meets all the following conditions based on the given input text. Think step by step and comprehensively.

#Conditions:

Easy to understand even for elementary school students.
Include the mechanism of a specific data structure.
Add an explanation about 3 specific and familiar use cases and their reasons.
List the representative methods of the input text.
Provide an explanation for each method.
Add an explanation about the computational complexity of the data structure in the input text.
#Input text:
Tree Traversal

#Output text:

Explanation:

Mechanism of Data Structure:

Use Cases:

Methods:

Computational Complexity:

Summary: