This document discusses how to improve software quality through code reviews. It begins by stating the goals of code review, such as improving code quality, sharing knowledge, and educating developers. It then discusses classification of code reviews from less to more formal. The document outlines some best practices for code reviews, including having a reviewer and author, choosing reviewers strategically, and driving the review in different ways. It provides answers to common questions about organizing effective code reviews and leaves with tips, such as tracking reviewers, using checklists, and ensuring comfortable conditions for all.