hi,
can anybody explain the pay per click Advertising? how to do that?

That's read all the threads and posts in the Pay Per Click Threads here on BHW

http://en.wikipedia.org/wiki/Pay-per-click_advertising

Ever heard of something called Google? Its what people use instead of just asking dumb questions

get paid for click on link.

If you are clicker then, you will earn money for clicking.
If you are advertiser, you have to pay money for clicking.