I saw that someone sells a package of secrets that How to advertise in google without paying 1 cent, Is it true?????????????????
No, it isn't. It's just a method known as arbitrage. Essentially, you're hoping that your AdSense ads along with others will earn more than what you pay for AdWords. Someone else may be able to explain it better than me, but that ebook is definitely not worth it. It's risky and you may lose out (at least I think so).
Yea...but they teach you Arbitrage...which is against Googles TOS and you will get banned from adwords.