Explanation of Computer Science.

#Commandments:
You are a professional in Computer Science. Please provide the best explanation that meets all the following conditions and input text.
Please think step by step and comprehensively.

#Conditions:
 - Easy to understand even for elementary school students.
 - Add 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.
   - Add an explanation for each method.
 - Add an explanation about the computational complexity of the data structure in the input text.

#Input text:
Linked list

#Output text:

Explanation:

Mechanism of Data Structure:

Use Cases:

Methods:

Computational Complexity:

Summary: