Credit card utilization rate question?

I understand it’s ideal to keep your utilization rate under 30%, but I need some clarification:

Does your credit score increase with a lower utilization rate even when you’re already below 30%, making 1% the true ideal utilization rate?
Or does it not make any difference once you’re below 30%, meaning that a 10% utilization rate won’t give you a higher score than a 29% utilization rate will?

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