the quickest way to lose friends and alienate people. Code review is the systematic approach to pointing out other developers` mistakes and code inconsistencies. If done well, code reviews should be less about the person and more about the code, but who are we kidding. Code reviews are usually done before merging a pull request into the main branch. This checks for code quality and also ensures that it won't break already existing features. Code reviews also help check if all cases are fully implemented or if existing automated tests need to be rewritten.
Team Lead: “Next time when you review someone`s code, could you at least TRY to say one positive thing?” Developer: “I really like the font.”