I had this friend who is Filipino and is quite good in computers particularly in web development. As we were going to school, he was making money by himself through making websites and charging fee for such.
Then he came to know Adsense and he made some experiments with it. One of the first websites he made was this Filipina actresses website that he monetized with Adsense. At first, he was so frustrated that nobody visits his site. He had a quite web design and a nice placement of the ads but it seems that those searching for Filipina Actresses websites were not reaching his website.
Then he came to know SEO. Again, he learned SEO by himself and applied it to his website. Then slowly, this Pinay celebrities website climbed the SERPs and steadily daily visitors from all over the world stared to flock in his site. With that development, his Adsense earnings also started to soar.