Guys most of the fresher’s to blogging will not know how they are going to earn the money through blog and that too using Adsense. Here I want to provide few points how the Adsense will pay to you when you place Adsense ads on your blog.

CPC (cost per click): also know as PPC (pay per click). Publisher get paid only when visitor click on an advertisement. If there is no click on an ad then there is no payment.

CPM - cost per mille (cost per thousand impressions): Publisher gets paid each time a CPM ad is displayed but it will be calculated for 1000 impressions of the ads (CPM is called cost per 1000 impressions because the amount paid for a single impression is usually very little, so that amount per impression is multiplied by 1000). It is irrespective of whether visitor click on the ad or whether an action (like buying something) by visitor is induced by the CPM ad.

CPA (cost per action): Also called PPA (pay per action or pay per acquisition), CPA ads require visitors to do more than just clicking on an ad. Publisher get paid only when a visitor who clicked on a CPA ad acted upon the advertisement such as buy something, filled in a form or other pre-defined action. No action, no pay.

So if you go for Google Adsense ads on to your Blog you will earn irrespective of whether ad has been clicked or not.

Furthermore, CPC and CPM ads offer an easier path to earning something from ads as compared to CPA ads which require action.

But however the amount paid for the CPA is grater than that of CPC and CPC is greater than that of CPM.

Defects using Adsense on Blogger Platform:

Bloggers cannot paste the Adsense JavaScript directly in to the post as there are some limitations

Advantage:

Google Adsense is very much a "paste and forget" operation because a publisher only has to paste AdSense's JavaScript in the proper place and forget about it. Adsense will continue to serve relevant ads there without publisher having to do anything.