Exempt from Backup Withholding

[Kwak]

Part of adsense tax information, what does "exempt from backup withholding" mean? This is my first time providing tax information, obviously.

[MyIce]

You should be exempt from backup withholding.
Here is some info:
http://web.ask.com/redir?bpg=http%3a%2f%2fweb.ask.com%2fweb%3fq%3dwha t%2bis%2bbackup%2bwithholding%253f%26o%3d0%26page% 3d1&q=what+is+backup+withholding%3f&u=http%3a%2f%2ftm.wc.ask.com%2fr%3ft%3dan%26s%3da% 26uid%3d0423C929847674BF3%26sid%3d1F213A29847674BF 3%26qid%3d2508381C25A2DE43BE69F10D49E667C6%26io%3d %26sv%3dza5cb0dc7%26o%3d0%26ask%3dwhat%2bis%2bback up%2bwithholding%253f%26uip%3d18ad46fe%26en%3dte%2 6eo%3d-100%26pt%3dTax%2bForm%2bW9%2band%2bBackup%2bWithho lding%252c%2bIRS%2band%2bTax%26ac%3d6%26qs%3d19%26 pg%3d1%26ep%3d1%26te_par%3d102%26te_id%3d%26u%3dht tp%3a%2f%2fwww.wwwebtax.com%2fgeneral%2fform_w9.ht m&s=a&bu=http%3a%2f%2fwww.wwwebtax.com%2fgeneral%2fform_ w9.htm&o=0