Code review is the process of systematically examining the source code written by developers to identify bugs, improve code quality, and ensure adherence to coding standards before the code is merged into the main project. This practice involves one or more team members reviewing another developer's code to provide feedback, suggest improvements, and catch errors that automated tools might miss. Code review can be conducted through various methods, such as pair programming, over-the-shoulder reviews, or using specialized tools like GitHub, GitLab, or Bitbucket.

The primary goal of code review is to improve the quality and maintainability of the codebase, fostering a collaborative environment where knowledge is shared among team members. It also helps in enforcing consistency in coding practices, reducing technical debt, and enhancing security by catching vulnerabilities early in the development process. Regular code reviews contribute to a culture of continuous learning and improvement within a development team, ultimately leading to more robust and reliable software.