Please sign in to your account at http://adwords.google.com/select/login , and update your billing information. 正式な入り口を書いているけど これは隠されている
Your account will be reactivated as soon as you update your payment information. お支払い情報を確認なんて書かれると焦る
Your ads will show immediately if you decide to pay for clicks via credit
your signed debit authorization before your ads start running, depending on your location. If you choose bank transfer, your ads will show as soon as we receive your first payment. 支払いが済み次第 広告が出せるのかな というより 初期設定 など払わなければ と考えて クレジットやデビットカード 考えるけど 後払いなら 当然 「銀行振り込み」も有りなのでは