As a developer, you will very likely work for a company that has a peer review process. While the specific process that a company uses may differ, there is one underlying goal - for you to write better code.
Why code reviews are important?
The code review process has multiple goals:
Ensure the team is staying up to date with changes in the code Ensure everyone is following the company approved style guide Better each others coding skills by creating discussion around different methods, or solutions Ensuring good documentation