How to review code in GitHub

Code review is an essential practice for engineers to ensure best practices, educate developers, and find defects or opportunities for improvement in code. Google principles emphasize technical facts over opinions and encourage providing resources and explanations when requesting changes. A good code review process should include guidelines on who to ask for a review, how many approvals are needed, mandatory checks before merging the pull request, and daily short sessions of less than an hour for reviewing. Understanding what is being reviewed, testing the code before looking at it, and keeping reviews fast are also crucial aspects. Large tasks should be separated into small pull requests to improve efficiency, and a good pull request template with a checklist can help prepare for the review.