Debt arbitration is a process where a third party works as the mediator between two and helps to work out a suitable solution. Debt arbitration is the similar process where a third party stands in the middle of the debtor and the creditor and mainly reduces the amount of total outstanding debt.
Though it is better than unpaid account or charged-off, it still hurts credit. It will be better if you can avoid this entry to enter your credit file.
BTW, did you have arbitration in a near past? Could you explain a bit more about your situation?