Getting High PR: Is It Good?

[webdevelop]

I call for your information and contribution to assist me get better PR. At the present time, I rank third for an exacting search word. I don�t acquire more than 60 visitors to my web site. I desire to advance my number of hits. I wish to earn more from AdSense. What if I shift up to the first or second place? How much would I be paid? Can somebody give me a coarse idea of this in proportion terms? I would actually be grateful for it. If this is significant enough, I wouldn�t mind augmenting my SEO hard work to rank well again. Thank you very much for your ideas.