What is a good reason for adding comments to your code?

Adding comments to your code serves several important purposes, and explaining the reasoning behind a code structure is a key function of well-placed comments. Comments help other developers (and your future self) understand why specific decisions were made during implementation, which can be crucial for maintaining and updating code later on. By clarifying the logic behind complex algorithms or outlining the purpose of certain blocks of code, comments facilitate better collaboration and lead to a more manageable codebase. They provide context that increases the readability and maintainability of the code, allowing others to navigate through it more easily and effectively.

In contrast, adding comments to confuse developers or for aesthetic reasons does not contribute to a codebase's usability or maintainability. Moreover, comments do not play a role in speeding up the compilation process; compiling is a separate step that depends on the code itself rather than any accompanying comments.