Code review is like having a friend double-check your homework before you turn it in. When programmers write code for a software project, they often ask their colleagues to look it over carefully. This is to make sure there are no mistakes, and that the code follows the best practices and standards. It's a bit like proofreading an essay to catch any spelling or grammar errors. Code reviewers read through the code, suggest improvements, and check for things that might cause problems later on. It's a team effort to ensure the code is of high quality and works smoothly. Just like how two heads are better than one, code review helps catch issues and make the code stronger before it's added to the project.