It is the simplest CPC ad program to join but requires a strong time investment to work. Joining is quick, and you create ads of different sizes, and text or image/text ads. You can then simply paste the code into your site where you want ads to show. You need sites visited daily by people (so the SEO has been done) and showing fresh content on a regular basis to retain those visitors and attract new visitors. It is not a case of putting up a blog, adding adsense ads, and hoping for the best. You have to spend time on the traffic to the site. It works, just be ready for hard work and lots of patience.