Clean Code refers to a set of principles and practices aimed at writing code that is easy to read, understand, and maintain. It emphasizes clarity, simplicity, and the use of meaningful names for variables and functions. By following these guidelines, developers can create software that is less prone to errors and easier to modify over time. The concept of Clean Code was popularized by Robert C. Martin, also known as "Uncle Bob," in his book titled "Clean Code: A Handbook of Agile Software Craftsmanship." The book outlines various techniques and best practices that help programmers produce high-quality code, ultimately leading to more efficient and effective software development.