What is the purpose of refactoring code?

The goal of code refactoring is to improve the internal structure of existing code without changing its external behavior. This is done to enhance readability, simplify maintenance and extension, and reduce technical debt.

Refactoring helps to:

• Make the code more understandable and logical
• Eliminate duplication
• Improve architecture and structure
• Increase development productivity

Example: replacing a long function with several small ones with clear names, which makes understanding and testing easier.