what is the cash back feature on credit cards?

I'm going to assume you'll be able to do a cash advance. Kinda like using a debit card.

you get a percentage rebate on all your purchases. spend $10,000 and you might get a check for $100 - $200 depending on the card.

Some cards give you 1% back on purchases, some give you even higher percent back on gas and other purchases. Check out my article on using free credit cards http://strategiesforlife.blogspot.co...l-fee-and.html