Code quality refers to the overall quality and maintainability of a software program's source code. It includes factors such as readability, maintainability, efficiency, reliability, and adherence to coding standards. High code quality is important for ensuring that a software program is easy to understand, debug, and modify, as well as being less prone to errors and bugs. Researchers in this area may develop tools and techniques to measure and improve code quality, as well as best practices for writing high-quality code.