https://pagefault.blog/2018/04/08/why-junior-devs-should-review-seniors-commits/

Code reviews are a great practise to find mistakes, potential bugs and other issues overlooked by the code author. Reviewing improves the overall code quality, but it is also a great way to share knowledge and information. Junior developers’ commits should certainly be reviewed by more senior developers, but juniors should also be the reviewers. Here’s why.