How does Google determine what ads to display? The reason I am asking this question is I have a brand new site dedicated to the mesothelioma cancer niche and it's not displaying the high paying ads. How do I increase the cpc? Let's say a famous celebrity tweeted a random site and visitors went to this brand new site, what high paying niche would be best for this to get "adsense clicks"? Most of my traffic is coming from twitter and I'm getting around 0.5% CTR but my cpc right now is quite low compared to my payday loans niche.