What key principles did you rely on when reviewing code to ensure its quality?

When reviewing code, I rely on the following key principles to ensure its quality:

• Readability and clarity: the code should be easily readable and understandable by other developers. Using clear names for variables, methods, and classes.
• Adherence to coding style: consistency in code formatting, complying with the standards adopted in the project.
• Absence of duplication: avoiding repetitive code, using reusable methods and classes.
• Correctness and security: checking for errors, exceptions, and potential vulnerabilities.
• Optimality and performance: the code should be efficient, without unnecessary resource consumption.
• Testability: the code should be easily covered by tests, with clearly defined logic.

Example: when reviewing a method, I pay attention to whether it performs a specific task, is not too long, and has a clear name.