Iam currently running google ads all over my site.
but how do I setup CPM ads? how do I check CPM stats?
are the displaying image ads constitute CPM ads? how do I confirm that?
If any advertiser chooses to sign up directly to your site through the 'advertise on this site' link - then they will have signed up to CPM ads.
By default the choice is between CPM and CPC ads - you cannot choose which type appears as google makes that choice based on which is likely to pay more to you.
To view site targeted ads or CPM ads in adsense you need to select 'Individual Ad' in the drop down box under Show data by ?
No, some CPM ads will still be delivered to your website - but not loads of them - just a few (depending on what types of campaigns are done by the advertisers in your niche area).
I had two skyscraper ads on one of my sites, one on top of the other. And I don't know why, but the bottom is almost ALWAYS CPM ad. Don't know how to explain it.