"Code smell" refers to any characteristic in code that may indicate a deeper problem, often making the code harder to understand or maintain. These issues are not outright bugs but suggest that the code could be improved. Common examples of code smells include duplicated code, long methods, and excessive use of global variables. Identifying these smells can help developers recognize areas that may need refactoring to enhance code quality. Addressing code smells is essential for maintaining a healthy codebase. Tools and practices, such as static analysis and code reviews, can help detect these issues early. By regularly refactoring and improving the code, developers can ensure that their software remains efficient, readable, and easier to manage over time.