In software development, a commit is the action of saving changes to a version control system along with a message describing what was changed and why. Think of it like saving a document, but with a detailed record of what changed and the ability to go back to any previous version. Each commit creates a checkpoint in the code's history. Good commit messages explain the purpose of changes, making it easier for team members (or future developers) to understand the codebase's evolution. Version control through commits is fundamental to modern software development, enabling collaboration while maintaining code integrity. Government digital services use version control to manage code changes systematically.