Is it possible to use the Adsense Earnings below 100 $ and transfer them to the adwords account to start an ad campain or isn't that possible? If yes then how?
As far as I know, you cannot transfer adsense earnings to your adwords account. You can make this happen yourself though. Get a bank account with a debit card. Deposit all of your adsense earnings into that account and then use your debit card to pay for your Adwords.