Tax Withholding Fresh Discussion

https://www.irs.gov/uac/Form-8233,-Exemption-From-Withholding-on-Compensation-for-Independent-(and-Certain-Dependent)-Personal-Services-of-a-Nonresident-Alien-Individual

Form 8233

Can any body tel what this form does. can we get exemption from Tax Withholding by filling this form?

Thanks