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In the context of version control systems (VCS) like Git, a commit represents a set of changes or edits made to a repository. It’s essentially a snapshot of the project at a specific point in time. Each commit is associated with a unique identifier (usually a hash), a commit message describing the changes, and information about the author.

When a user makes changes to a file or multiple files in a repository, these changes are not officially recorded until the user commits them. This allows for granular control over the changes that are included in each commit. For instance, if a developer fixes two unrelated bugs, they can make two separate commits for each fix. This makes it easier to understand the history of the project and, if needed, to undo changes (by reverting commits).

Committing changes involves two steps: staging and committing. In the staging step, you specify which changes you want to include in the upcoming commit. Once the changes are staged, you can commit them with a descriptive message.

In Git, you can use the command git commit -m "Your descriptive message" to commit changes. The -m option lets you include a commit message inline.

It’s important to note that these commits are local to your copy of the repository. To share your commits with others or to save them to a remote repository, you would need to use the git push command.

Committing changes frequently is considered a good practice as it keeps track of your progress and makes it easier to isolate problems if any occur later on. It’s also generally recommended to make each commit a logically separate changeset, i.e., each commit should represent a single task or a single issue solved.

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