Git - What does -m mean [closed]

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In Git, when we type for example:

$ git commit -m "xyz"

What does -m mean?

Thanks.

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-m stands for message - i.e., the commit message that everyone will see attached to your commit.

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Snippet from git commit --help

-m <msg>, --message=<msg>
           Use the given <msg> as the commit message.

For every git command/action, you can type git <command> --help to get the documentation on it.

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This is used to describe your commit, what you've done in this commit.
Your could check the man page by man git-commit, which will tell you more.