Your preferred username; punctuation is not allowed except for periods, hyphens, and underscores.

A valid e-mail address. All e-mails from the system will be sent to this address. The e-mail address is not made public and will only be used if you wish to receive a new password or wish to receive certain news or notifications by e-mail.

Go to My account -> Edit, then click on the category that you defined for the Google AdSense client ID and enter your Google ID, which is something like "pub-9999999999999", and click Submit. The content of this field is kept private and will not be shown publicly.

Copy the characters (respecting upper/lower case) from the image.