You sign up for AdSense and if your site is accepted, (we'll cover this process later in the course) Google gives you some code to paste into your web pages. It's JavaScript stuff that you can simply add into the HTML of your page. When someone views your page this JavaScript fetches ads from Google. If they then CLICK on your ad, Google charges the advertiser a click through fee and shares it with you. This is entirely AUTOMATIC so if you have a content rich site with lots of traffic that is not currently making you any money, AdSense is something you should seriously consider. Now maximising this process is much harder and it raises what I call the content dilemma which we'll explore later too: Is your site designed to earn AdSense revenue or is its main objective something else? The reason you need to think this one through is that when someone clicks on an AdSense ad on your website they go away because AdSense ad clicks never open up a new window.