Committing changes
The git commit command lets you record file changes in the repository’s Git history.
Every change you commit will be viewable in chronological order in the respective file or directory.
A 40-character checksum hash uniquely identifies each commit. You can use the checksum hash to retrieve the status or changes made on the given commit in your repository.
Separating different types of changes — such as bug fixes, new features, and improvements — into different sets of commits will allow you and your team members to understand why and how those changes were made quickly.