Google Adsense User? Come inside!

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Hello if anyone can answer my questions below. I am gonna give him the best response trophy lol. As long as you can answer it clearly,chronologically, and in descriptive manner. Oh well back to the point. I am unfamiliar with this Google Ad sense and I want to know something about it. 1. What is google ad sense? 2. How can I earn money from it? 3. I heard you can connect it to your blog. (Well I got an blogger.com account how can I do it?) 4. Can i earn good from it? 5. How can I use it effectively? Thank you. I hope you answer me clearly thanks!