I am not sure what is the main difference in these two terms:
As far as I know CPC is cost per click and CPM is cost per impression.
Which one is more beneficial in terms of SEO and making money?
Sorry, but this is far too vague a question, as a simple search would have sufficed to answer the question. There are plenty of articles on the subject, such as [this and [URL="http://www.themarketinglounge.org/display/cpc-or-cpm"]this](http://www.melissadata.com/enews/marketingadvisor/articles/0810c/2.htm). Please search (both the forums and via your favorite search engine), and if you've still got SPECIFIC questions, please feel free to repost.
In the meantime, THREAD CLOSED.