How do I create a Google Account?
You'll be able to create a Google Account during the update process after you sign in to your DoubleClick product. If you want to create a Google Account before the update process, just visit the account-creation page, enter your business email address, and choose a password. Once you've finished registering, you'll receive a verification email. Click the link in that email to complete the verification process.
Click here to learn more about creating a Google Account.