if you claim 0, you may have a few dollars less in your paycheck and then get it back at the end of the year as a refund. If you 1, you could owe something at the end of the year. The perfect return is to not owe any money and not get a refund.
The IRS Estimator will let you know how much you should be withholding. Tax Withholding Estimator | Internal Revenue Service (irs.gov)
