What does the left green or yellow vetical line meaning?

I’m writing the python code, and using the git for version control. When I add or modify the code ,the green/yellow line left show or the red arrow . What does the left green or yellow vetical line meaning

It indicates the git status of the corresponding lines, green is for added lines, yellow for modified lines and the red arrow indicates where lines have been removed.

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Got it .
Thanks

Is there a way to disable this feature?