I have a personal Google Account. Should I use it when I update my DoubleClick username and password?
No, we recommend you create a separate Google Account for business, and use that Account when updating your DoubleClick sign-in information. We also encourage you to create a Google Account that uses your work email (firstname.lastname@example.org), and does not link to an existing personal Gmail Account.
If you use the same computer to sign in to both your business and personal Google Accounts, always make sure that you're signing in with the correct email address for your business Account. Learn why.