GitHub takes the pain out of committing, resolving conflicts, and merging code. It is, without a doubt, an essential tool in any developer's toolkit and essential for development teams. Even if you are not using it professionally, it's a great idea to create a repo for yourself. Start using it to check on the pet projects you work on after hours. Expanding your knowledge beyond what you work with on a day-to-day basis will make you a better developer.