Code documentation refers to the written descriptions and explanations that accompany computer code. It helps developers understand how the code works, what its purpose is, and how to use it effectively. Good documentation can include comments within the code, user manuals, and API references, making it easier for others to read and maintain the code. Effective code documentation is essential for collaboration among developers and for future code updates. It ensures that anyone working on the project can quickly grasp its functionality and make necessary changes without extensive guidance. This practice ultimately improves code quality and project efficiency.