What is google adwords and how does it benefit your website?

I was wondering if anyone could explain in details about Google Adwords. Do you make money off of it or do you have to pay Google for specific words? What is the best way to make money from advertisements on your website? Where do you find these advertisers?

Google adwords is an advertisement techniqe where you can register an account to google, and after successfull resgistation they will give a pice of html code to put in your website. The google crawlers automativcally identifies the content in you page and display ad according to the contents in your we page. you dont need to pay google anything. Once someone click on the advertisement in your page they will pay you a small % of money. You can accumulate all money and google will send you cheque once it reaches a certain amount.