For a publisher, there are different kinds of ads are available and CPC and CPM are two common types ads. CPC ads are the ads that will earn you from clicks on your ads. CPM ads are the ads that will earn you from ad impression. Adsense provides CPC ads and Infolinks provide CPM ads. You can use both types of ads on your site. But the question is what kinds of ads will earn you better. The rate of earning on CPC dependa on how much advertisers are paying for each ckick. And CPM rate is based on traffic location. Please share your experience and knowledge.