A "code review" in software engineering is a process in which developers collaborate on a project by jointly reviewing each other's code. The goal of a code review is to improve the overall quality of the codebase and prevent errors or defects from creeping into new features or updates. In some cases, multiple pairs of eyes will be more effective at identifying problems with the code than only one pair would be.
Code review articles talk about the best practices for reviewing code, providing an overview of code quality, and discussing how to improve code using automated tools. These articles may cover topics such as static analysis, linters, and test coverage.